diff --git a/src/core/atcore.h b/src/core/atcore.h
--- a/src/core/atcore.h
+++ b/src/core/atcore.h
@@ -242,6 +242,12 @@
      */
     bool isSdMounted() const;
 
+    /**
+     * @brief isSdWriting
+     * @return true if writing to sd card
+     */
+    bool isSdWriting() const;
+
 signals:
 
     /**
@@ -303,6 +309,18 @@
      */
     void sdCardFileListChanged(const QStringList &fileList);
 
+    /**
+     * @brief WriteToSD precentage changed.
+     * @param newProgress.
+     */
+    void sdWriteProgressChanged(float newProgress);
+
+    /**
+     * @brief sdWriteChanged
+     * @param writing: true if writing to file.
+     */
+    void sdWriteChanged(bool writing);
+
 public slots:
 
     /**
@@ -473,6 +491,13 @@
      */
     void sdCardPrintStatus();
 
+    /**
+     * @brief Write a file to the machines SdCard
+     * @param fileName: Local file to send to machine
+     * @return True if successful
+     */
+    bool toSd(const QString &fileName);
+
 private slots:
     /**
      * @brief processQueue send commands from the queue.
diff --git a/src/core/atcore.cpp b/src/core/atcore.cpp
--- a/src/core/atcore.cpp
+++ b/src/core/atcore.cpp
@@ -66,6 +66,7 @@
     bool sdCardMounted = false;         //!< @param sdCardMounted: True if Sd Card is mounted.
     bool sdCardReadingFileList = false; //!< @param sdCardReadingFileList: True while getting file names from sd card
     bool sdCardPrinting = false;        //!< @param sdCardPrinting: True if currently printing from sd card.
+    bool sdWriting = false;             //!< @param sdWriting: True if writing to sd card.
     QString sdCardFileName;             //!< @param sdCardFileName: name of file being used from sd card.
     QStringList sdCardFileList;         //!< @param sdCardFileList: List of files on sd card.
 };
@@ -765,6 +766,11 @@
     return d->sdCardReadingFileList;
 }
 
+bool AtCore::isSdWriting() const
+{
+    return d->sdWriting;
+}
+
 void AtCore::setReadingSdCardList(bool readingList)
 {
     d->sdCardReadingFileList = readingList;
@@ -836,3 +842,85 @@
     qCDebug(ATCORE_CORE) << "SerialError:" << errorString;
     emit atcoreMessage(QStringLiteral("SerialError: %1").arg(errorString));
 }
+
+bool AtCore::toSd(const QString &fileName)
+{
+    //Do a few sanity checks before attempting to write to SD.
+    //Can't write an empty fileName.
+    if (fileName.isEmpty()) {
+        qCDebug(ATCORE_CORE) << "Sd Write Failed: Empty fileName.";
+        return false;
+    }
+    //Can not write if plugin doesn't have Sd Support.
+    if (!d->firmwarePlugin->isSdSupported()) {
+        qCDebug(ATCORE_CORE) << "Sd Write Failed: Firmware plugin does not support Sd functions.";
+        return false;
+    }
+
+    //If the card is not mounted try to read the file list and mount it.
+    if (!d->sdCardMounted) {
+        getSDFileList();
+        if (!d->sdCardMounted) {
+            qCDebug(ATCORE_CORE) << "Sd Write Failed unable to mount Sd Card";
+            return false;
+        }
+    }
+    // Be sure the printer is IDLE
+    if (d->printerState == AtCore::DISCONNECTED) {
+        qCDebug(ATCORE_CORE) << "No Device Connected.";
+        return false;
+    } else if (d->printerState != AtCore::IDLE) {
+        qCDebug(ATCORE_CORE) << "Sd Write Failed: Device is Busy";
+        return false;
+    }
+
+    bool restoreTimer  = d->tempTimer->isActive();
+    int timerTime = 0;
+    if (restoreTimer) {
+        timerTime = d->tempTimer->interval();
+        d->tempTimer->stop();
+    }
+
+    //Process without thread.
+    QString fname = QFileInfo(fileName).fileName();
+    QFile *file = new QFile(fileName);
+    file->open(QFile::ReadOnly);
+    QTextStream *txtStream = new QTextStream(file);
+    const qint64 filesize = file->size();
+    float progress = 0;
+    qint64 stillSize = filesize;
+    QString cline;
+
+    setState(AtCore::BUSY);
+    d->sdWriting = true;
+    emit sdWriteChanged(d->sdWriting);
+    pushCommand(GCode::toCommand(GCode::M28, fname));
+
+    while (!txtStream->atEnd()) {
+        if (state() == AtCore::STOP) {
+            txtStream->setString(new QString());
+            progress = 100;
+        } else {
+            cline = txtStream->readLine();
+            stillSize -= cline.size() + 1; //remove read chars
+            progress = float(filesize - stillSize) * 100 / float(filesize);
+        }
+        pushCommand(cline);
+        processQueue();
+        emit sdWriteProgressChanged(progress);
+        qDebug() << "Progress:" << progress << "Current Line:" << cline;
+    }
+
+    pushCommand(GCode::toCommand(GCode::M29, fname));
+
+    file->close();
+    setState(AtCore::IDLE);
+    getSDFileList();
+
+    d->sdWriting = false;
+    if (restoreTimer) {
+        d->tempTimer->start(timerTime);
+    }
+    emit sdWriteChanged(d->sdWriting);
+    return true;
+}
diff --git a/src/plugins/marlinplugin.h b/src/plugins/marlinplugin.h
--- a/src/plugins/marlinplugin.h
+++ b/src/plugins/marlinplugin.h
@@ -55,9 +55,26 @@
      */
     QString name() const override;
 
+    /**
+     * @brief Translate common commands to firmware specific command.
+     * @param command: command to translate
+     * @return firmware specific translated command
+     */
+    QByteArray translate(const QString &command) override;
+
     /**
      * @brief validateCommand to filter commands from messages
      * @param lastMessage: last Message from printer
      */
     void validateCommand(const QString &lastMessage) override;
+
+private:
+    /**
+     * @brief Convert a filename to 8.3 Because Marlin will only accept those, Generates a 8.3 like Filename.
+     * This is Close to but not a 8.3 filename for instance we do not check the Filesystem so ~# will not be added if files with similar names are on the sd card
+     * Marlin will overwrite files with the samename.
+     * @param fileName: to convert to 8.3 format.
+     * @return  Return a 8.3 Format name
+     */
+    QString shortName(const QString &fileName);
 };
diff --git a/src/plugins/marlinplugin.cpp b/src/plugins/marlinplugin.cpp
--- a/src/plugins/marlinplugin.cpp
+++ b/src/plugins/marlinplugin.cpp
@@ -22,7 +22,9 @@
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
+#include <QFileInfo>
 #include <QLoggingCategory>
+#include <QRegularExpression>
 #include <QString>
 
 #include "marlinplugin.h"
@@ -45,6 +47,33 @@
     qCDebug(MARLIN_PLUGIN) << name() << " plugin loaded!";
 }
 
+QByteArray MarlinPlugin::translate(const QString &command)
+{
+    //Capture M28 <string>
+    static const auto marlin_M28RegEx = QRegularExpression(QStringLiteral("M28 \\S+"));
+    //Capture both M29 and M29 <string> but not M290
+    static const auto marlin_M29RegEx = QRegularExpression(QStringLiteral("M29( \\S*)?[^0]"));
+
+    QString temp = command;
+    if (marlin_M28RegEx.match(command).hasMatch()) {
+        QString filename = temp.mid(4, temp.length());
+        filename = shortName(filename);
+        temp = QStringLiteral("M28 %1").arg(filename);
+
+    } else if (marlin_M29RegEx.match(command).hasMatch()) {
+        if (temp.length() > 3) {
+            //command contains file name
+            QString filename = temp.mid(4, temp.length());
+            filename = shortName(filename);
+            temp = QStringLiteral("M29 %1").arg(filename);
+        } else {
+            temp = QStringLiteral("M29");
+        }
+    }
+
+    return temp.toLocal8Bit();
+}
+
 void MarlinPlugin::validateCommand(const QString &lastMessage)
 {
     if (lastMessage.contains(QStringLiteral("End file list"))) {
@@ -96,3 +125,20 @@
         }
     }
 }
+
+QString MarlinPlugin::shortName(const QString &fileName)
+{
+    //Generate an 8.3 Like FileName.
+    QString newName;
+    QFileInfo info(fileName);
+    newName = info.baseName().toUpper();
+
+    if (newName.length() > 8) {
+        newName.resize(8);
+    }
+
+    newName.append(QStringLiteral("."));
+    newName.append(info.suffix().toUpper());
+    newName.replace(QStringLiteral(".GCODE"), QStringLiteral(".GCO"));
+    return newName;
+}
diff --git a/src/widgets/sdwidget.h b/src/widgets/sdwidget.h
--- a/src/widgets/sdwidget.h
+++ b/src/widgets/sdwidget.h
@@ -58,6 +58,11 @@
      */
     void deleteSdFile(const QString &fileName);
 
+    /**
+     * @brief User has selected to write a file for the sd card.
+     */
+    void writeSdFile();
+
 private:
     QListWidget *listSdFiles = nullptr;
 };
diff --git a/src/widgets/sdwidget.cpp b/src/widgets/sdwidget.cpp
--- a/src/widgets/sdwidget.cpp
+++ b/src/widgets/sdwidget.cpp
@@ -15,6 +15,7 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
+#include <QFileDialog>
 #include <QGroupBox>
 #include <QHBoxLayout>
 #include <QPushButton>
@@ -42,6 +43,12 @@
         }
     });
 
+    newButton = new QPushButton(tr("Send File"));
+    hBoxLayout->addWidget(newButton);
+    connect(newButton, &QPushButton::clicked, this, [this] {
+        emit writeSdFile();
+    });
+
     newButton = new QPushButton(tr("Delete Selected"));
     hBoxLayout->addWidget(newButton);
     connect(newButton, &QPushButton::clicked, this, [this] {
diff --git a/testclient/mainwindow.h b/testclient/mainwindow.h
--- a/testclient/mainwindow.h
+++ b/testclient/mainwindow.h
@@ -136,6 +136,11 @@
      */
     void initWidgets();
 
+    /**
+     * @brief Handle WriteToSd
+     */
+    void writeToSd();
+
 //Private GUI Items
     //menuView is global to allow for docks to be added / removed.
     QMenu *menuView = nullptr;
diff --git a/testclient/mainwindow.cpp b/testclient/mainwindow.cpp
--- a/testclient/mainwindow.cpp
+++ b/testclient/mainwindow.cpp
@@ -54,6 +54,7 @@
     connect(core, &AtCore::stateChanged, this, &MainWindow::printerStateChanged);
     connect(core, &AtCore::portsChanged, this, &MainWindow::locateSerialPort);
     connect(core, &AtCore::sdCardFileListChanged, sdWidget, &SdWidget::updateFilelist);
+    connect(sdWidget, &SdWidget::writeSdFile, this, &MainWindow::writeToSd);
 }
 
 void MainWindow::initMenu()
@@ -584,3 +585,39 @@
         statusWidget->showPrintArea(false);
     }
 }
+
+void MainWindow::writeToSd()
+{
+    static QString filter = tr("GCode Files(*.gco *.gcode)");
+    QString fileName = QFileDialog::getOpenFileName(
+                           this
+                           , tr("Write file to SD")
+                           , QDir::homePath()
+                           , tr("All Files(*.*);;GCode Files(*.gco *.gcode)")
+                           , &filter
+                       );
+
+    if (!fileName.isEmpty() && QFileInfo(fileName).isReadable()) {
+        QProgressDialog *dialog = new QProgressDialog(tr("Writing file to SD Card..."), tr("Cancel"), 0, 100, this);
+
+        connect(core, &AtCore::sdWriteChanged, this, [dialog](bool writing) {
+            if (writing) {
+                QApplication::processEvents();
+                dialog->open();
+            } else {
+                dialog->close();
+            }
+        });
+        connect(core, &AtCore::sdWriteProgressChanged, dialog, &QProgressDialog::setValue);
+
+        connect(dialog, &QProgressDialog::canceled, this, [this] {
+            core->setState(AtCore::STOP);
+        });
+
+        if (!core->toSd(fileName)) {
+            QMessageBox::warning(this, tr("Write to Sd"), tr("Writing FAILED"));
+            dialog->close();
+            core->setState(AtCore::IDLE);
+        }
+    }
+}