Index: sources/gui/GuiView.h
===================================================================
diff -u -r4a67c01045f365be38f1a12a8572c0070d343e1e -r3caffb866d4c84ac6282dcd36fc2d8f7cad9584d
--- sources/gui/GuiView.h	(.../GuiView.h)	(revision 4a67c01045f365be38f1a12a8572c0070d343e1e)
+++ sources/gui/GuiView.h	(.../GuiView.h)	(revision 3caffb866d4c84ac6282dcd36fc2d8f7cad9584d)
@@ -7,7 +7,7 @@
  *
  * \file    GuiView.h
  * \author  (last)      Behrouz NematiPour
- * \date    (last)      03-Jun-2021
+ * \date    (last)      18-Apr-2022
  * \author  (original)  Behrouz NematiPour
  * \date    (original)  26-Aug-2020
  *
@@ -49,15 +49,27 @@
     PROPERTY(quint64, sdTotal       , 0     )
     PROPERTY(quint64, sdAvail       , 0     )
     PROPERTY(quint8 , sdPercent     , 0     )
-    PROPERTY(quint8 , sdIsLow       , false )
+    PROPERTY(bool   , sdIsLow       , false )
 
     // this property will be set if the sd-card space gets lower than required amount in percent that has been defined in DeviceController.
-    PROPERTY(qint8  , sdTooLowPecent, -1) // -1 means the event never happened
+    PROPERTY(qint8  , sdTooLowPecent, -1    ) // -1 means the event never happened
     // disabled coco end
 
-    PROPERTY(bool   , usbReady      , false)
-    PROPERTY(bool   , usbRemoved    , true )
+#ifdef  BUILD_FOR_DESKTOP
+    PROPERTY(bool   , usbIsReady    , true  )
+    PROPERTY(bool   , usbIsRemoved  , false )
+#else
+    PROPERTY(bool   , usbIsReady    , false )
+    PROPERTY(bool   , usbIsRemoved  , true  )
+#endif
 
+    PROPERTY(quint64, usbTotal      , 0     )
+    PROPERTY(quint64, usbAvail      , 0     )
+    PROPERTY(quint8 , usbPercent    , 0     )
+    PROPERTY(bool   , usbIsLow      , false )
+
+    PROPERTY(bool   , exportRunning , false )
+
 public:
     explicit GuiView(QObject *parent = nullptr);
 
@@ -76,6 +88,8 @@
     void  onSDCardSpaceTooLow(quint8 vAvailablePercent);
     void  onSDCardSpaceChange(bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);
 
+    void  onUSBSpaceChange   (bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);
+
 public slots: // is public since will be used in the UI and is in the same thread.
     void  doActionTransmit(GuiActionType vAction, const QVariantList &vData); // UI => HD/DG
     void  doActionTransmit(GuiActionType vAction, const QVariant     &vData); // UI => HD/DG