Index: sources/gui/guicontroller.h
===================================================================
diff -u -rfee7fabf49befb065c89248c19e15efc9ca194e4 -rfbeafa0714f065bce0403e2e8ce68f6d8fbea6bd
--- sources/gui/guicontroller.h	(.../guicontroller.h)	(revision fee7fabf49befb065c89248c19e15efc9ca194e4)
+++ sources/gui/guicontroller.h	(.../guicontroller.h)	(revision fbeafa0714f065bce0403e2e8ce68f6d8fbea6bd)
@@ -42,12 +42,22 @@
 public slots:
     void  doActionTransmit(GuiActionType vAction, const QVariantList &vData); // UI => HD/DG
 
+    void  doUSBDriveUmount();                                                 // UI => OS
+
+
 private slots: // Should be private for thread safety and is connected internally.
     void  onActionReceive (GuiActionType vAction, const QVariantList &vData); // UI <= HD/DG
 
+    void  onUSBDriveMount ();                                                 // OS => UI
+    void  onUSBDriveRemove();                                                 // OS => UI
+
 signals:
     void didActionReceive (GuiActionType vAction, const QVariantList &vData); // UI <= HD/DG
     void didActionTransmit(GuiActionType vAction, const QVariantList &vData); // UI => HD/DG
+
+    void didUSBDriveMount ();
+    void didUSBDriveUmount();
+    void didUSBDriveRemove();
 };
 
 }