diff --git a/LibServer/Systems/processingsystem.cpp b/LibServer/Systems/processingsystem.cpp
index 7e6f7ad..0f101e2 100644
--- a/LibServer/Systems/processingsystem.cpp
+++ b/LibServer/Systems/processingsystem.cpp
@@ -652,7 +652,7 @@ void ProcessingSystem::processingClientQueryTasksXML(ClientHandler *client, Clie
         nameFile = tasksFIMfileName;
         pathFile = updateController->getPathAdditionalFile(nameFile);
         Logger::instance().log(pathFile);
-        client->sendFileBlock(pathFile);
+        client->sendFileBlock_forGUI(pathFile);
         client->sendPacketType(PacketType::TYPE_XMLANSWER_QUERY_TASKS_XML_FIM);
     }
     else if(clientQueryTasksXML.Type == "amm")
@@ -660,7 +660,7 @@ void ProcessingSystem::processingClientQueryTasksXML(ClientHandler *client, Clie
         nameFile = tasksAMMfileName;
         pathFile = updateController->getPathAdditionalFile(nameFile);
         docsUpdater->lockAccessToDocsXML();
-        client->sendFileBlock(pathFile);
+        client->sendFileBlock_forGUI(pathFile);
         client->sendPacketType(PacketType::TYPE_XMLANSWER_QUERY_TASKS_XML_AMM);
         docsUpdater->unLockAccessToDocsXML();
     }
diff --git a/LibServer/Systems/recognizesystem.cpp b/LibServer/Systems/recognizesystem.cpp
index 760b500..f7ecf3f 100644
--- a/LibServer/Systems/recognizesystem.cpp
+++ b/LibServer/Systems/recognizesystem.cpp
@@ -1,7 +1,8 @@
 #include "recognizesystem.h"
 
 RecognizeSystem::RecognizeSystem(QObject *parent):
-QObject(parent)
+QObject(parent),
+globalMutex(nullptr)
 {
     packetType = PacketType::TYPE_NONE;
     filePath.clear();
@@ -13,7 +14,7 @@ QObject(parent)
 
 }
 
-void RecognizeSystem::initialize(UpdateController *updateController,DataParser* dataParser,SendSystem *sendSystem, ClientHandler *handler)
+void RecognizeSystem::initialize(UpdateController *updateController,DataParser* dataParser, QMutex *globalMutex,SendSystem *sendSystem, ClientHandler *handler)
 {
     qDebug() << "RecognizeSystem::initialize thread ID " << QThread::currentThreadId();
 
@@ -22,6 +23,7 @@ void RecognizeSystem::initialize(UpdateController *updateController,DataParser*
     this->clientHandler = handler;
     this->sendSystem = sendSystem;
     socket = handler->getSocket();
+    this->globalMutex = globalMutex;
 
     connect(this,&RecognizeSystem::sigCalculateHash,updateController,&UpdateController::calculateFullHashWithSetup,Qt::AutoConnection);
     connect(this,&RecognizeSystem::sigChangeVersion,updateController,&UpdateController::changeAssetVersion,Qt::AutoConnection);
@@ -29,7 +31,7 @@ void RecognizeSystem::initialize(UpdateController *updateController,DataParser*
     connect(this,&RecognizeSystem::sigCopyVersion,updateController,&UpdateController::createCopyVersion,Qt::AutoConnection);
     connect(this,&RecognizeSystem::sigXmlParser,dataParser->getProcessParser(),&ProcessParser::slot_read,Qt::AutoConnection);
     //connect(this,&RecognizeSystem::sigRecalculateDocs,server,&ServerLMSWidget::slot_UpdateDocs,Qt::AutoConnection);
-    connect(this,&RecognizeSystem::sigSendDocs,sendSystem,&SendSystem::sendDocs,Qt::AutoConnection);
+    connect(this,&RecognizeSystem::sigSendDocs_forQtClient,sendSystem,&SendSystem::slot_sendDocs_forQtClient,Qt::AutoConnection);
 }
 
 void RecognizeSystem::recognize()
@@ -403,7 +405,7 @@ void RecognizeSystem::recognize()
 
             if (updateController->checkDuplicate(result[1]))
             {
-                sendSystem->sendNotify(commandDuplicateVerName);
+                sendSystem->slot_sendNotify(commandDuplicateVerName);
                 packetType = PacketType::TYPE_NONE;
                 break;
             }
@@ -425,11 +427,11 @@ void RecognizeSystem::recognize()
 
             if (versionName == baseNameVersion)
             {
-                sendSystem->sendNotify(commandTryBaseDelete);
+                sendSystem->slot_sendNotify(commandTryBaseDelete);
             }
             else if (versionName == updateController->getCurrentVersionName())
             {
-                sendSystem->sendNotify(commandTryActiveDelete);
+                sendSystem->slot_sendNotify(commandTryActiveDelete);
             }
             else
             {
@@ -452,7 +454,7 @@ void RecognizeSystem::recognize()
 
         if(packetType == PacketType::GET_DOCS)
         {
-            emit sigSendDocs(updateController->getPathAdditionalFile(tasksAMMfileName));
+            emit sigSendDocs_forQtClient(updateController->getPathAdditionalFile(tasksAMMfileName));
         }
 
         if (packetType == PacketType::SEND_HASH)
diff --git a/LibServer/Systems/recognizesystem.h b/LibServer/Systems/recognizesystem.h
index 5dda0e6..ba93219 100644
--- a/LibServer/Systems/recognizesystem.h
+++ b/LibServer/Systems/recognizesystem.h
@@ -22,7 +22,7 @@ class RecognizeSystem : public QObject
 
 public:
     RecognizeSystem(QObject *parent = nullptr);
-    void initialize(UpdateController *updateController,DataParser *dataParser, SendSystem *sendSystem, ClientHandler *handler);
+    void initialize(UpdateController *updateController,DataParser *dataParser, QMutex *globalMutex, SendSystem *sendSystem, ClientHandler *handler);
     void recognize();
     ~RecognizeSystem();
 
@@ -34,7 +34,7 @@ signals:
     void sigDeleteVersion(QString versionName);
     void sigCopyVersion(QString versionName,QString newVersionName,QString author);
     //void sigRecalculateDocs();
-    void sigSendDocs(QString docsPath);
+    void sigSendDocs_forQtClient(QString docsPath);
 
     void signal_updateDocsXML();
 
@@ -47,6 +47,7 @@ private:
     QString filePath;
     ClientHandler *clientHandler;
     QMutex *mutex;
+    QMutex *globalMutex;
 
     QTcpSocket *socket;
 
diff --git a/LibServer/Systems/sendsystem.cpp b/LibServer/Systems/sendsystem.cpp
index 03611f1..b7c66f9 100644
--- a/LibServer/Systems/sendsystem.cpp
+++ b/LibServer/Systems/sendsystem.cpp
@@ -1,88 +1,370 @@
 #include "sendsystem.h"
 
-SendSystem::SendSystem(QObject *parent) : QObject(parent)
+SendSystem::SendSystem(QObject *parent) :
+    QObject(parent),
+    client(nullptr),
+    socket(nullptr),
+    dataParser(nullptr),
+    globalMutex(nullptr),
+    buffer(nullptr),
+    type(TypeClientAutorization::TYPE_GUI),
+    flSendingStopped(false),
+    flWaitWritenToSocket(false),
+    bytesWritedToSocket(0),
+    fileSize(0),
+    countSend(0)
 {
-    isSendStopped = false; 
+    qDebug() << "SendSystem init thread ID " << QThread::currentThreadId();    
+
+    buffer = new char[sendFileBlockSize];
 }
 
-void SendSystem::initialize(DataParser *dataParser,QMutex *globalMutex)
+SendSystem::~SendSystem()
+{
+    delete buffer;
+}
+
+
+void SendSystem::initialize(DataParser *dataParser, QMutex *globalMutex)
 {
     qDebug() << "SendSystem::initialize thread ID " << QThread::currentThreadId();
 
     this->dataParser = dataParser;
-    //connect(this,&SendSystem::sigSendXMLmessage,dataParser->ClientAnswer(),&ClientAnswerParser::message,Qt::AutoConnection); //сигнал не используется
-    connect(this,&SendSystem::sigSendNotify,dataParser->ClientAnswer(),&ClientAnswerParser::notify,Qt::DirectConnection); //потому что возвращает значение
-    //connect(this,&SendSystem::sigSendVersion,dataParser->ClientAnswer(),&ClientAnswerParser::currentVersion,Qt::AutoConnection); //сигнал не используется
+    this->globalMutex = globalMutex;
 
-    mutex = globalMutex;
+    connect(this, &SendSystem::sigSendNotify, dataParser->ClientAnswer(), &ClientAnswerParser::notify, Qt::DirectConnection); //потому что возвращает значение
 }
 
-void SendSystem::setClient(Client *client,QTcpSocket *socket)
+void SendSystem::setClient(Client *client, QTcpSocket *socket)
 {
-    this->socket = socket;
-    this->type = client->getClientType();
+    qDebug() << "SendSystem::setClient thread ID " << QThread::currentThreadId();
+
+    this->socket = socket;    
     this->client = client;
-    isSendStopped = false;
+
+    this->type = client->getClientType();
+
+    flSendingStopped = false;
 }
 
-void SendSystem::sendNotify(QString notify)
+void SendSystem::updateFiles(QList<FileData> fileSendList, QList<FileData> deleteList)
 {
-    qDebug() << "SendSystem::sendNotify thread ID " << QThread::currentThreadId();
+    QListIterator<FileData> clientIterator(deleteList);
 
+    while(clientIterator.hasNext())
+    {
+        FileData data = clientIterator.next();
+
+        slot_sendDeleteBlock(data.path);
+        if(slot_getIsSendingStopped())
+        {
+            Logger::instance().log("Client: " + client->getLogin() + " isSendStopped", LogLevel::ERROR);
+            return;
+        }
+    }
+
+    QListIterator<FileData> serverIterator(fileSendList);
+
+    while(serverIterator.hasNext())
+    {
+        FileData data = serverIterator.next();
+
+        if (data.hash == "FOLDER")
+        {
+            slot_sendFolderBlock(data.path);
+        }
+        else
+        {
+            slot_sendFileBlock_forQtClient(data.path);
+        }
+
+        if(slot_getIsSendingStopped())
+        {
+            return;
+        }
+    }
+
+    slot_sendPacketType(PacketType::UPDATE_FILES_COMPLETE);
+}
+
+bool SendSystem::waitWrittenData(QString marker, int msec)
+{
+    bool success = socket->waitForBytesWritten(msec);
+    if(success)
+    {
+        //qInfo() << "Data sended OK. <" + marker + ">";
+    }
+    else
+    {
+        qDebug() << "WaitForBytesWritten timeout. <" + marker + ">";
+    }
+    return success;
+}
+
+
+void SendSystem::slot_BytesWrittenToSocket(qint64 bytes)
+{
+    flWaitWritenToSocket = false;
+    bytesWritedToSocket = bytes;
+}
+
+bool SendSystem::slot_getIsSendingStopped() const
+{
+    return flSendingStopped;
+}
+
+void SendSystem::slot_stopSending()
+{
+    flSendingStopped = true;
+}
+
+void SendSystem::slot_socketClose()
+{
+    socket->close();
+}
+
+
+void SendSystem::slot_sendVersion()
+{
+    QByteArray data = dataParser->ClientAnswer()->currentVersion();
+    slot_sendXmlAnswer(data);
+}
+
+void SendSystem::slot_sendNotify(QString notify)
+{
     auto answer = emit sigSendNotify(notify);
-    sendXmlAnswer(answer);
+    slot_sendXmlAnswer(answer);
 }
 
-void SendSystem::sendFileBlock(QString path)
+void SendSystem::slot_sendPacketType(PacketType packetType)
 {
-    QFile file(path);
-    QFileInfo fileInfo(file);
+    Logger::instance().log(" SEND TO: " + client->getLogin() + " " + enumToString(packetType), LogLevel::DEBUG);
+    if (client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT ||
+        client->getClientType() == TypeClientAutorization::TYPE_GUI)
+    {
+        QDataStream stream(socket);
+        stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+        stream << packetType;
 
-    if(isSendStopped)
+        waitWrittenData("sendPacketType");
+    }
+    else
+    {
+        QByteArray message;
+        int type = (int)packetType;
+        message.append(reinterpret_cast<char*>(&type), sizeof(int));
+        socket->write(message);
+    }
+}
+
+void SendSystem::slot_sendXmlAnswer(QByteArray array, PacketType packetType)
+{
+    Logger::instance().log("SEND TO: "+ client->getLogin() + " " + enumToString(packetType) + "\n Text: " +
+                           QString(array), LogLevel::DEBUG);
+
+    if (client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT ||
+        client->getClientType() == TypeClientAutorization::TYPE_GUI)
+    {
+        QDataStream stream(socket);
+        stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+        stream << packetType;
+        stream << array;
+
+        waitWrittenData("sendXmlAnswer");
+    }
+    else
+    {
+        slot_sendPacketType(packetType);
+        QByteArray message;
+        int size = array.length();
+        message.append(reinterpret_cast<char*>(&size), sizeof(int));
+        socket->write(message);
+        socket->write(array);
+    }
+}
+
+void SendSystem::slot_sendDocs_forQtClient(QString docsPath)
+{
+    slot_sendFileBlock_forQtClient(docsPath);
+}
+
+void SendSystem::slot_sendNeedUpdate(bool flag, quint64 size, quint64 fileCount, quint64 deleteCount)
+{
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+    stream << PacketType::TYPE_NEEDUPDATE;
+    stream << flag;
+    stream << size;
+    stream << fileCount;
+    stream << deleteCount;
+
+    waitWrittenData("sendNeedUpdate");
+}
+
+void SendSystem::slot_sendFolderBlock(QString path)
+{
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+    stream << PacketType::TYPE_FOLDER;
+    stream << path;
+
+    waitWrittenData("sendFolderBlock");
+}
+
+void SendSystem::slot_sendDeleteBlock(QString path)
+{
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+    stream << PacketType::TYPE_DELETE;
+    stream << path;
+
+    waitWrittenData("sendDeleteBlock");
+}
+
+void SendSystem::slot_sendFileBlock_forGUI(QString path)
+{
+    //qDebug() << "SendSystem::sendFileBlock path: " << path;
+
+    if(slot_getIsSendingStopped())
     {   //Поведение на случай отключения клиента
-        file.close();
-        Logger::instance().log("UNLOCK STOP MUTEX : " + client->getLogin(),LogLevel::ERROR);
+        Logger::instance().log("Client: " + client->getLogin() + " isSendingStopped", LogLevel::ERROR);
         return;
     }
 
-    QDataStream stream(socket);
-    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+    QFile file(path);
+    QFileInfo fileInfo(file);
 
     fileSize = file.size();
 
     if (fileSize == 0)
     {
-        Logger::instance().log("Client: " + client->getLogin() +  " WARNING! Zero size " + fileInfo.fileName(),LogLevel::ERROR);
-        Logger::instance().log(path,LogLevel::ERROR);
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File zero size " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
         return;
     }
 
-    stream << PacketType::TYPE_FILE; //Отправляем тип блока
+    if(!file.open(QFile::ReadOnly))
+    {
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File not open: " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
+        return;
+    }
+
+    countSend = 0;
+
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+    stream << PacketType::TYPE_FILE;
     stream << path << fileSize;
 
-    if(file.open(QFile::ReadOnly))
-    {
-        while(!file.atEnd())
-        {
-            QByteArray data = file.read(sendFileBlockSize);
-            stream << data;
-            //socket->waitForBytesWritten(10);
+    waitWrittenData("sendFileBlock:header " + fileInfo.fileName());
 
-            if(socket->state() == QAbstractSocket::UnconnectedState) break;
-            countSend++;
+    while(!file.atEnd())
+    {
+        if(socket->state() == QAbstractSocket::UnconnectedState)
+        {
+            Logger::instance().log("Client: " + client->getLogin() + " UnconnectedState", LogLevel::ERROR);
+            break;
         }
 
-        //emit sigSendToLogger(Tools::getTime() + " send file " + fileInfo.fileName());
+        QByteArray data = file.read(sendFileBlockSize);
+        stream << data;
+
+        waitWrittenData(QString("sendFileBlock:data (size %1) ").arg(data.size()) + fileInfo.fileName());
+
+        countSend++;
     }
 
     file.close();
     countSend = 0;
 }
 
-void SendSystem::sendFileBlockByteArray(QByteArray array, PacketType packetType)
+void SendSystem::slot_sendFileBlock_forQtClient(QString path)
 {
-    if(client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT ||
-           client->getClientType() == TypeClientAutorization::TYPE_GUI)
+    //qDebug() << "SendSystem::sendFileBlock path: " << path;
+
+    if(slot_getIsSendingStopped())
+    {   //Поведение на случай отключения клиента
+        Logger::instance().log("Client: " + client->getLogin() + " isSendingStopped", LogLevel::ERROR);
+        return;
+    }
+
+    QFile file(path);
+    QFileInfo fileInfo(file);
+
+    fileSize = file.size();
+
+    if (fileSize == 0)
+    {
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File zero size " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
+        return;
+    }
+
+    if(!file.open(QFile::ReadOnly))
+    {
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File not open: " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
+        return;
+    }
+
+    countSend = 0;
+
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+    stream << PacketType::TYPE_FILE;
+    stream << path << fileSize;
+
+    waitWrittenData("sendFileBlock:header " + fileInfo.fileName());
+
+    connect(this->socket, &QTcpSocket::bytesWritten, this, &SendSystem::slot_BytesWrittenToSocket);
+
+    while(!file.atEnd())
+    {
+        if(socket->state() == QAbstractSocket::UnconnectedState)
+        {
+            Logger::instance().log("Client: " + client->getLogin() + " UnconnectedState", LogLevel::ERROR);
+            break;
+        }
+
+        qint64 readBytes = file.read(buffer, sendFileBlockSize);
+        if(readBytes <= 0)
+            break;
+
+       flWaitWritenToSocket = true;
+
+        while(!socket->write(buffer, readBytes))
+        {            
+            qCritical() << "socket->write ERROR. size " + QString::number(readBytes);
+            int i = 0;
+            i++;
+        }
+        while(flWaitWritenToSocket)
+        {
+            QCoreApplication::processEvents(); // Обеспечиваем обработку сообщений
+            int i = 0;
+            i++;
+        }
+
+        waitWrittenData(QString("sendFileBlock:data (readBytes %1, num %2) ").arg(QString::number(readBytes), QString::number(countSend)) + fileInfo.fileName());
+
+        countSend++;
+    }
+
+    disconnect(this->socket, &QTcpSocket::bytesWritten, this, &SendSystem::slot_BytesWrittenToSocket);
+
+    file.close();
+    countSend = 0;
+}
+
+void SendSystem::slot_sendFileBlockByteArray(QByteArray array, PacketType packetType)
+{
+    if(client->getClientType() == TypeClientAutorization::TYPE_GUI)
     {
         QDataStream stream(socket);
         stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
@@ -99,17 +381,52 @@ void SendSystem::sendFileBlockByteArray(QByteArray array, PacketType packetType)
          stream << packetType; //Отправляем тип блока
          stream << size;
 
+         waitWrittenData("sendFileBlockByteArray");
+
          while (bytesSended < size)
          {
-             QByteArray chunk = array.mid(bytesSended,sendFileBlockSize);
+             QByteArray chunk = array.mid(bytesSended, sendFileBlockSize);
              stream << chunk;
+             //bytesSended = socket->write(chunk);
+
+             waitWrittenData("sendFileBlockByteArray");
 
              bytesSended += chunk.length();
          }
     }
+    else if(client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT)
+     {
+         QDataStream stream(socket);
+         stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+         qint64 size = array.size();
+         qint64 bytesSended = 0;
+
+         if (size == 0)
+         {
+            Logger::instance().log(" WARNING! Zero size ",LogLevel::ERROR);
+                     return;
+          }
+
+          stream << packetType; //Отправляем тип блока
+          stream << size;
+
+          waitWrittenData("sendFileBlockByteArray");
+
+          while (bytesSended < size)
+          {
+              QByteArray chunk = array.mid(bytesSended, sendFileBlockSize);
+              //stream << chunk;
+              bytesSended = socket->write(chunk);
+
+              waitWrittenData("sendFileBlockByteArray");
+
+              bytesSended += chunk.length();
+          }
+     }
     else
     {
-         sendPacketType(packetType);
+         slot_sendPacketType(packetType);
          qint64 size = array.size();
          qint64 bytesSended = 0;
 
@@ -125,7 +442,7 @@ void SendSystem::sendFileBlockByteArray(QByteArray array, PacketType packetType)
 
          while (size > 0)
          {
-             QByteArray chunk = array.mid(bytesSended,sendFileBlockSize);
+             QByteArray chunk = array.mid(bytesSended, sendFileBlockSize);
              bytesSended = socket->write(chunk);
 
              size -= bytesSended;
@@ -134,211 +451,86 @@ void SendSystem::sendFileBlockByteArray(QByteArray array, PacketType packetType)
     }
 }
 
-void SendSystem::sendVersion()
+void SendSystem::slot_sendFileBlockWithRename_Hash_forQtClient(QString path, QString newName)
 {
-    QByteArray data = dataParser->ClientAnswer()->currentVersion();
-    sendXmlAnswer(data);
-}
+    //qDebug() << "SendSystem::sendFileBlockWithRename thread ID " << QThread::currentThreadId();
 
-void SendSystem::sendFileBlockWithRename(QString path, QString newName)
-{
-    qDebug() << "SendSystem::sendFileBlockWithRename thread ID " << QThread::currentThreadId();
-
-    QDataStream stream(socket);
-    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+    if(slot_getIsSendingStopped())
+    {   //Поведение на случай отключения клиента
+        Logger::instance().log("Client: " + client->getLogin() + " isSendingStopped", LogLevel::ERROR);
+        return;
+    }
 
     QFile file(Tools::createRootPath(path));
     QFileInfo fileInfo(file);
     fileSize = fileInfo.size();
 
-    if(fileSize == 0){
-        Logger::instance().log("Client: " + client->getLogin() + " WARNING! Zero size " + fileInfo.fileName(),LogLevel::ERROR);
+    if (fileSize == 0)
+    {
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File zero size " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
+        return;
+    }
+
+    if(!file.open(QFile::ReadOnly))
+    {
+        Logger::instance().log("Client: " + client->getLogin() +  " ERROR! File not open: " + fileInfo.fileName(), LogLevel::ERROR);
+        Logger::instance().log(path, LogLevel::ERROR);
         return;
     }
 
     QString pathForSend = Tools::createFolderPath(path) + "/" + staticDataFolderName + newName;
 
-    stream << PacketType::TYPE_FILE; //Отправляем тип блока
+    countSend = 0;
 
+    QDataStream stream(socket);
+    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
+
+    stream << PacketType::TYPE_FILE;
     stream << pathForSend << fileSize;
 
-    if(isSendStopped) {             //Поведение на случай отключения клиента
+    waitWrittenData("sendFileBlockWithRename");
 
-        file.close();
-        return;
-    }
+    connect(this->socket, &QTcpSocket::bytesWritten, this, &SendSystem::slot_BytesWrittenToSocket);
 
-
-    socket->waitForBytesWritten();
-
-    if(file.open(QFile::ReadOnly)){
-        while(!file.atEnd()){
-            QByteArray data = file.read(sendFileBlockSize);
-            stream << data;
-            socket->waitForBytesWritten();
-            countSend++;
+    while(!file.atEnd())
+    {
+        if(socket->state() == QAbstractSocket::UnconnectedState)
+        {
+            Logger::instance().log("Client: " + client->getLogin() + " UnconnectedState", LogLevel::ERROR);
+            break;
         }
 
-        Logger::instance().log("Send file " + fileInfo.fileName());
+        qint64 readBytes = file.read(buffer, sendFileBlockSize);
+        if(readBytes <= 0)
+            break;
+
+       flWaitWritenToSocket = true;
+
+        while(!socket->write(buffer, readBytes))
+        {
+            qCritical() << "socket->write ERROR. size " + QString::number(readBytes);
+            int i = 0;
+            i++;
+        }
+        while(flWaitWritenToSocket)
+        {
+            QCoreApplication::processEvents(); // Обеспечиваем обработку сообщений
+            int i = 0;
+            i++;
+        }
+
+        waitWrittenData(QString("sendFileBlock:data (readBytes %1, num %2) ").arg(QString::number(readBytes), QString::number(countSend)) + fileInfo.fileName());
+
+        countSend++;
     }
 
+    disconnect(this->socket, &QTcpSocket::bytesWritten, this, &SendSystem::slot_BytesWrittenToSocket);
+
     file.close();
     countSend = 0;
-    socket->waitForBytesWritten();
-    socket->waitForReadyRead(100);
-
-    sendNotify(commandHashCompleteClient);
-}
-
-void SendSystem::sendFolderBlock(QString path)
-{
-    QDataStream stream(socket);
-    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
-
-    stream << PacketType::TYPE_FOLDER;
-    stream << path;
-}
-
-void SendSystem::sendDeleteBlock(QString path)
-{
-    QDataStream stream(socket);
-    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
-
-    stream << PacketType::TYPE_DELETE;
-    stream << path;
-    qDebug() << "DELETE: " + path;
-    socket->waitForReadyRead(10);
-}
-
-void SendSystem::sendPacketType(PacketType packetType)
-{
-    Logger::instance().log(" SEND TO: " + client->getLogin() + " " + enumToString(packetType), LogLevel::DEBUG);
-    if (client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT ||
-        client->getClientType() == TypeClientAutorization::TYPE_GUI)
-    {
-
-        QDataStream stream(socket);
-        stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
-        stream << packetType;
-        socket->waitForReadyRead(100);
-    }
-    else
-    {
-        QByteArray message;
-        int type = (int)packetType;
-        message.append(reinterpret_cast<char*>(&type), sizeof(int));
-        socket->write(message);
-    }
-
-}
-
-void SendSystem::sendXmlAnswer(QByteArray array, PacketType packetType)
-{
-    qDebug() << "SendSystem::sendXmlAnswer thread ID " << QThread::currentThreadId();
-
-    Logger::instance().log("SEND TO: "+ client->getLogin() + " " + enumToString(packetType) + "\n Text: " +
-                           QString(array),LogLevel::DEBUG);
-
-    if (client->getClientType() == TypeClientAutorization::TYPE_QT_CLIENT ||
-        client->getClientType() == TypeClientAutorization::TYPE_GUI)
-    {
-        QDataStream stream(socket);
-        stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
-
-        stream << packetType;
-        stream << array;
-        socket->waitForBytesWritten();
-    }
-    else
-    {
-        sendPacketType(packetType);
-        QByteArray message;
-        int size = array.length();
-        message.append(reinterpret_cast<char*>(&size), sizeof(int));
-        socket->write(message);
-        socket->write(array);
-    }
-}
-
-void SendSystem::sendNeedUpdate(bool flag,quint64 size,quint64 fileCount,quint64 deleteCount)
-{
-    QDataStream stream(socket);
-    stream.setVersion(QDataStream::Qt_DefaultCompiledVersion);
-    stream << PacketType::TYPE_NEEDUPDATE;
-    stream << flag;
-    stream << size;
-    stream << fileCount;
-    stream << deleteCount;
-}
-
-void SendSystem::updateFiles(QList<FileData> fileSendList, QList<FileData> deleteList){
-
-    QMutexLocker locker(mutex);
-    QListIterator<FileData> clientIterator(deleteList);
-
-    while(clientIterator.hasNext())
-    {
-        FileData data = clientIterator.next();
-
-        sendDeleteBlock(data.path);
-        if(getIsSendStopped())
-        {
-            return;
-        }
-    }
-
-    QListIterator<FileData> serverIterator(fileSendList);
-
-    while(serverIterator.hasNext())
-    {
-        FileData data = serverIterator.next();
-
-        if (data.hash == "FOLDER")
-        {
-            sendFolderBlock(data.path);
-            socket->waitForBytesWritten();
-        }
-        else
-        {
-            sendFileBlock(data.path);
-            socket->waitForBytesWritten();
-        }
-
-        if(isSendStopped)
-        {
-            return;
-        }
-    }
-    sendPacketType(PacketType::UPDATE_FILES_COMPLETE);
-}
-
-
-void SendSystem::socketClose()
-{
-    socket->close();
-}
-
-void SendSystem::sendStop()
-{
-    isSendStopped = true;
-}
-
-void SendSystem::sendCFI(QByteArray array)
-{
-     sendXmlAnswer(array,PacketType::TYPE_UPDATEDCFI);
-}
-
-void SendSystem::sendDocs(QString docsPath)
-{
-    sendFileBlock(docsPath);
-}
-
-bool SendSystem::getIsSendStopped() const
-{
-    return isSendStopped;
-}
-
-SendSystem::~SendSystem()
-{
+    //waitWrittenData("sendFileBlockWithRename");
+    //socket->waitForReadyRead(100);
 
+    slot_sendNotify(commandHashCompleteClient);
 }
diff --git a/LibServer/Systems/sendsystem.h b/LibServer/Systems/sendsystem.h
index 7dd3066..9e04cb5 100644
--- a/LibServer/Systems/sendsystem.h
+++ b/LibServer/Systems/sendsystem.h
@@ -13,56 +13,69 @@
 
 class DataParser;
 class FileData;
+
 class SendSystem : public QObject
 {
-
     Q_OBJECT
 public:
     explicit SendSystem(QObject* parent = nullptr);
+    ~SendSystem();
 
     void initialize(DataParser* dataParser,QMutex *globalMutex);
     void setClient(Client* client,QTcpSocket *socket);
-    void sendMessageBlock(QString message);
-    void sendFileBlock(QString path);
-    void sendFileBlockByteArray(QByteArray array, PacketType packetType);
-    void sendFileBlockWithRename(QString path,QString newName);
-    void sendFolderBlock(QString path);
-    void sendDeleteBlock(QString path);
-    void sendPacketType(PacketType packet);
-    void sendNotify(QString notify);
-    void sendStop();
-    void sendCFI(QByteArray array);
-    void sendDocs(QString docPath);
-    void sendXmlAnswer(QByteArray array, PacketType packetType = PacketType::TYPE_XMLANSWER);
-    void sendNeedUpdate(bool flag,quint64 size,quint64 fileCount,quint64 deleteCount);
+
     void updateFiles(QList<FileData> fileSendList, QList<FileData> deleteList);
 
-    bool getIsSendStopped() const;
+private:
+    bool waitWrittenData(QString marker, int msec = 500);
 
-    ~SendSystem();
+public slots:    
+    void slot_BytesWrittenToSocket(qint64 bytes);
 
+    bool slot_getIsSendingStopped() const;
+    void slot_stopSending();
 
-    void updateFilesFULL(QList<FileData> fileSendList, QList<FileData> deleteList);
-public slots:
-    void socketClose();
-    void sendVersion();
+    void slot_socketClose();
+
+    void slot_sendVersion();
+
+    void slot_sendNotify(QString notify);
+    void slot_sendPacketType(PacketType packet);
+    void slot_sendXmlAnswer(QByteArray array, PacketType packetType = PacketType::TYPE_XMLANSWER);
+
+    void slot_sendDocs_forQtClient(QString docPath);
+
+    void slot_sendNeedUpdate(bool flag,quint64 size,quint64 fileCount,quint64 deleteCount);
+
+    void slot_sendFolderBlock(QString path);
+    void slot_sendDeleteBlock(QString path);
+
+    void slot_sendFileBlock_forGUI(QString path);
+    void slot_sendFileBlock_forQtClient(QString path);
+    void slot_sendFileBlockByteArray(QByteArray array, PacketType packetType);
+    void slot_sendFileBlockWithRename_Hash_forQtClient(QString path,QString newName);
 
 signals:
-    void sigLoadHash();
-    //QByteArray sigSendXMLmessage(QString loginFrom, QString loginTo, QString text, QString userType); //сигнал не используется
     QByteArray sigSendNotify(QString message);
-    //QByteArray sigSendVersion(); //сигнал не используется
 
 private:
     Client *client;
     QTcpSocket* socket;
     DataParser* dataParser;
-    quint64 fileSize;
-    QMutex *mutex;
-    QWaitCondition *waitCondition;
-    int countSend;
-    bool isSendStopped;
+
+    QMutex *globalMutex; //Не используется (но пока оставлен)
+
+    char* buffer;
+
     TypeClientAutorization type;
+
+    bool flSendingStopped;
+
+    bool flWaitWritenToSocket;
+    qint64 bytesWritedToSocket;
+
+    qint64 fileSize;
+    int countSend;
 };
 
 #endif // SENDSYSTEM_H
diff --git a/LibServer/Systems/tools.h b/LibServer/Systems/tools.h
index 2cbd5d6..04fbdfc 100644
--- a/LibServer/Systems/tools.h
+++ b/LibServer/Systems/tools.h
@@ -58,7 +58,8 @@ static const QString commandeGetOfflineMessages = "GETOFFLINEMESSAGE";
 static const QString commandGetCFI = "GETCFI";
 
 //static quint64 fileBlockSize = 1460;
-static quint64 sendFileBlockSize = 256000;
+const int BLOCK_SIZE = 1024 * 1024; // Размер блока
+static quint64 sendFileBlockSize = /*256000*/BLOCK_SIZE;
 static quint64 readFileBlockSize = 65535;
 //1025*250
 
diff --git a/LibServer/Systems/updatecontroller.cpp b/LibServer/Systems/updatecontroller.cpp
index 1f34f20..3b3eae7 100644
--- a/LibServer/Systems/updatecontroller.cpp
+++ b/LibServer/Systems/updatecontroller.cpp
@@ -54,10 +54,12 @@ void UpdateController::changeAssetVersion(QString versionName)
 
     currentStreamingPath = assetManager->setVersion(versionName);
     setUpCurrentServerHash();
-    emit sigUpdateDocsXML();
+
     commonClientHandler->slot_sendPacketToAllClients(PacketType::HASH_READY, false);
     commonClientHandler->sendCurrentVersionToAllClient();
 
+    emit sigUpdateDocsXML();
+
     //commonClientHandler->slot_sendPacketToAllClients(PacketType::FREE);
     res = emit signal_BlockAutorization(false, "SERVER", "ChangeAssetVersion");
 }
diff --git a/LibServer/clienthandler/clienthandler.cpp b/LibServer/clienthandler/clienthandler.cpp
index 4eeb7e1..d40e976 100644
--- a/LibServer/clienthandler/clienthandler.cpp
+++ b/LibServer/clienthandler/clienthandler.cpp
@@ -14,14 +14,15 @@ ClientHandler::ClientHandler( QObject *parent):
 void ClientHandler::initialize(int descriptor,
     UpdateController *updateController,DataParser *dataParser, QMutex *mutex)
 {
-    this->socket = new QTcpSocket;
-    this->thread = new QThread;
+    qDebug() << "ClientHandler::initialize thread ID " << QThread::currentThreadId();
 
+    socket = new QTcpSocket;
+    thread = new QThread;
+
+    QIODevice::OpenMode openMode =  socket->openMode();
     socket->setParent(nullptr);
     socket->setSocketDescriptor(descriptor);
 
-    qDebug() << "ClientHandler::initialize thread ID " << QThread::currentThreadId();
-
     sendSystem = new SendSystem;
     recognizeSystem = new RecognizeSystem;
 
@@ -41,28 +42,29 @@ void ClientHandler::initialize(int descriptor,
 
     connect(recognizeSystem,&RecognizeSystem::signal_updateDocsXML,this,&ClientHandler::signal_updateDocsXML);
 
-    connect(this,&ClientHandler::sigSendXmlAnswer,sendSystem,&SendSystem::sendXmlAnswer,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigInitSender,sendSystem,&SendSystem::initialize,Qt::AutoConnection/*Qt::DirectConnection*/);
-    connect(this,&ClientHandler::sigFileBlock,sendSystem,&SendSystem::sendFileBlock,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigFileBlockByteArray,sendSystem,&SendSystem::sendFileBlockByteArray,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigFolderBlock,sendSystem,&SendSystem::sendFolderBlock,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigGetIsSendStopped,sendSystem,&SendSystem::getIsSendStopped,/*Qt::AutoConnection*/Qt::DirectConnection); //Возвращает значение
-    connect(this,&ClientHandler::sigSendDeleteBlock,sendSystem,&SendSystem::sendDeleteBlock,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigNeedUpdate,sendSystem,&SendSystem::sendNeedUpdate,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigSendNotify,sendSystem,&SendSystem::sendNotify,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigSendFileBlockWithRename,sendSystem,&SendSystem::sendFileBlockWithRename,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigSendVersion,sendSystem,&SendSystem::sendVersion,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigSocketClose,sendSystem,&SendSystem::socketClose,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSendXmlAnswer,sendSystem,&SendSystem::slot_sendXmlAnswer,Qt::AutoConnection);
+    //connect(this,&ClientHandler::sigInitSender,sendSystem,&SendSystem::initialize,Qt::AutoConnection/*Qt::DirectConnection*/);
+    connect(this,&ClientHandler::sigFileBlock_forGUI,sendSystem,&SendSystem::slot_sendFileBlock_forGUI,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigFileBlockByteArray,sendSystem,&SendSystem::slot_sendFileBlockByteArray,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigFolderBlock,sendSystem,&SendSystem::slot_sendFolderBlock,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigGetIsSendStopped,sendSystem,&SendSystem::slot_getIsSendingStopped,/*Qt::AutoConnection*/Qt::DirectConnection); //Возвращает значение
+    connect(this,&ClientHandler::sigSendDeleteBlock,sendSystem,&SendSystem::slot_sendDeleteBlock,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigNeedUpdate,sendSystem,&SendSystem::slot_sendNeedUpdate,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSendNotify,sendSystem,&SendSystem::slot_sendNotify,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSendFileBlockWithRename_Hash_forQtClient,sendSystem,&SendSystem::slot_sendFileBlockWithRename_Hash_forQtClient,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSendVersion,sendSystem,&SendSystem::slot_sendVersion,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSocketClose,sendSystem,&SendSystem::slot_socketClose,Qt::AutoConnection);
     //connect(this,&ClientHandler::sigSocketFlush,sendSystem,&SendSystem::socketFlush,Qt::AutoConnection); //не используется
-    connect(this,&ClientHandler::sigSendPacketType,sendSystem,&SendSystem::sendPacketType,Qt::AutoConnection);
-    connect(this,&ClientHandler::sigSendStop,sendSystem,&SendSystem::sendStop,Qt::DirectConnection);
+    connect(this,&ClientHandler::sigSendPacketType,sendSystem,&SendSystem::slot_sendPacketType,Qt::AutoConnection);
+    connect(this,&ClientHandler::sigSendStop,sendSystem,&SendSystem::slot_stopSending,Qt::DirectConnection);
 
     connect(socket,&QTcpSocket::readyRead,this,&ClientHandler::initClientType,Qt::AutoConnection);
     initClientType();
 
-    recognizeSystem->initialize(updateController,dataParser,sendSystem, this);
+    recognizeSystem->initialize(updateController,dataParser, mutex,sendSystem, this);
     sendSystem->setClient(client,socket);
-    emit sigInitSender(dataParser, mutex);
+    sendSystem->initialize(dataParser, mutex);
+    //emit sigInitSender(dataParser, mutex);
 
     Logger::instance().log("SERVER: Client connected");
 }
@@ -99,7 +101,7 @@ void ClientHandler::initClientType()
 void ClientHandler::sendHash()
 {
     QString path = "\\" + hashFileName;
-    emit sigSendFileBlockWithRename(path,"/serverHash.xml");
+    emit sigSendFileBlockWithRename_Hash_forQtClient(path,"/serverHash.xml");
     //emit sigSendNotify("HASHSENDCOMPLETE");
 }
 
@@ -133,9 +135,9 @@ void ClientHandler::sendXmlAnswer(QByteArray array, PacketType packetType)
     emit sigSendXmlAnswer(array, packetType);
 }
 
-void ClientHandler::sendFileBlock(QString path)
+void ClientHandler::sendFileBlock_forGUI(QString path)
 {
-    emit sigFileBlock(path);
+    emit sigFileBlock_forGUI(path);
 }
 
 void ClientHandler::sendFileBlockByteArray(QByteArray array, PacketType packetType)
diff --git a/LibServer/clienthandler/clienthandler.h b/LibServer/clienthandler/clienthandler.h
index f7c08f5..2c32f06 100644
--- a/LibServer/clienthandler/clienthandler.h
+++ b/LibServer/clienthandler/clienthandler.h
@@ -27,7 +27,7 @@ public:
     void initSender(DataParser *dataParser);
     void sendXmlAnswer(QByteArray array, PacketType packetType = PacketType::TYPE_XMLANSWER);
     void sendFolderBlock(QString path);
-    void sendFileBlock(QString path);
+    void sendFileBlock_forGUI(QString path);
     void sendFileBlockByteArray(QByteArray array, PacketType packetType);
     bool getIsSendStopped();
     void sendDeleteBlock(QString path);
@@ -51,9 +51,9 @@ public:
 
 signals:
     void sigSendXmlAnswer(QByteArray array, PacketType packetType);
-    void sigInitSender (DataParser *dataParse, QMutex *mutex);
+    //void sigInitSender (DataParser *dataParse, QMutex *mutex);
     void sigFolderBlock(QString path);
-    void sigFileBlock(QString path);
+    void sigFileBlock_forGUI(QString path);
     void sigFileBlockByteArray(QByteArray array, PacketType packetType);
     bool sigGetIsSendStopped();
     void sigSendDeleteBlock(QString path);
@@ -62,7 +62,7 @@ signals:
     void sigSendHash();
     void sigRecognize(ClientHandler *handler);
     void sigSendNotify(QString notify);
-    void sigSendFileBlockWithRename (QString path,QString newName);
+    void sigSendFileBlockWithRename_Hash_forQtClient (QString path,QString newName);
     void sigSocketClose();
     //bool sigSocketFlush(); //не используется
     void sigSendVersion();
@@ -71,6 +71,10 @@ signals:
 
     void signal_updateDocsXML();
 
+private:
+    void initClientType();
+    void packetTypeInit(PacketType packet, Client *client);
+
 public :
     QThread *thread;
     QTcpSocket *socket;
@@ -82,11 +86,7 @@ private:
     UpdateController *updateController;
     RecognizeSystem *recognizeSystem;
     Client *client;
-
-    SendSystem *sendSystem;
-
-    void initClientType();
-    void packetTypeInit(PacketType packet, Client *client);
+    SendSystem *sendSystem;    
 };
 
 #endif // CLIENTHANDLER_H
diff --git a/LibServer/multithreadserver/multithreadserver.cpp b/LibServer/multithreadserver/multithreadserver.cpp
index 84d1541..dccca63 100644
--- a/LibServer/multithreadserver/multithreadserver.cpp
+++ b/LibServer/multithreadserver/multithreadserver.cpp
@@ -4,6 +4,7 @@ MultiThreadServer::MultiThreadServer(UpdateController *updateController, DocsUpd
     DataParser *dataParser,qint16 hostPort, QObject *parent ):
     QTcpServer(parent),
     mutex(nullptr),
+    clientsMap(nullptr),
     hostPort(hostPort),
     processingSystem(processingSystem),
     updateController(updateController),
@@ -23,6 +24,7 @@ MultiThreadServer::MultiThreadServer(UpdateController *updateController, DocsUpd
 MultiThreadServer::~MultiThreadServer()
 {
     delete mutex;
+    delete clientsMap;
 }
 
 void MultiThreadServer::incomingConnection(qintptr socketDesriptor)
diff --git a/LibServer/multithreadserver/multithreadserver.h b/LibServer/multithreadserver/multithreadserver.h
index 8bf4771..766e8ac 100644
--- a/LibServer/multithreadserver/multithreadserver.h
+++ b/LibServer/multithreadserver/multithreadserver.h
@@ -33,7 +33,7 @@ public:
     {
         return stateBlockAutorization;
     }
-    EStateServer getStateServer()
+    EStateServer getStateServer() const
     {
         return stateServer;
     }
@@ -58,6 +58,9 @@ private:
         emit signal_StateServer(stateServer, stateBlockAutorization);
     }
 
+    void removeClient(int idSocket);
+    void addClient(qintptr descriptor, ClientHandler *client);
+
 signals:
     //void sigInitClient(int descriptor, ServerLMSWidget *serverWidget,
     //                   UpdateController *updateController, DataParser *dataParser, QMutex *mutex);
@@ -95,10 +98,7 @@ private:
 
     EStateServer stateServer;
     EStateBlockAutorization stateBlockAutorization;
-    QMap<QString, QString> blockersMap;
-
-    void removeClient(int idSocket);
-    void addClient(qintptr descriptor, ClientHandler *client);
+    QMap<QString, QString> blockersMap;    
 };
 
 #endif // MULTITHREADSERVER_H