Index: sources/gui/qml/SDItem.qml
===================================================================
diff -u -r27cc308ff5113a9386899d3c8f8b29962a8498e1 -r768259b3c00ee3fbc5ba04475763b43cfac76bfe
--- sources/gui/qml/SDItem.qml	(.../SDItem.qml)	(revision 27cc308ff5113a9386899d3c8f8b29962a8498e1)
+++ sources/gui/qml/SDItem.qml	(.../SDItem.qml)	(revision 768259b3c00ee3fbc5ba04475763b43cfac76bfe)
@@ -33,6 +33,15 @@
     signal  clicked
     signal  doubleClicked
 
+    readonly property int sizePowers : 1000000
+
+    function sdTotalConverted() {
+        return (_GuiView.sdTotal
+                /sizePowers         // convert from byte to Giga byte
+                /1000)              // round to 1000
+        .toFixed(1)                 // round to 1 floating point
+    }
+
     color           : Colors.transparent
     anchors {
         top         : parent.top
@@ -55,10 +64,19 @@
         anchors.fill: parent
         diameter: _root.width
         minimum : 0
-        maximum : _GuiView.sdTotal / 1000000 // convert to MB since the value in byte is too big for ProgressCircle.
-        value   : _GuiView.sdAvail / 1000000 // convert to MB since the value in byte is too big for ProgressCircle.
+        maximum :   _GuiView.sdTotal / sizePowers // convert to MB since the value in byte is too big for ProgressCircle.
+        value   :   _GuiView.sdAvail / sizePowers // convert to MB since the value in byte is too big for ProgressCircle.
         color   : ! _GuiView.sdIsReady ? "red" : _GuiView.sdIsReadOnly ? "gray" : _GuiView.sdIsLow ? Colors.red : "green"
     }
+    Text { id: _SDTotal
+        anchors.top: parent.bottom
+        anchors.horizontalCenter: parent.horizontalCenter
+        color   : Colors.white
+        text    : _root.sdTotalConverted()
+        visible : _GuiView.sdIsReady
+        font.pixelSize: 12
+        font.bold: true
+    }
 
     MouseArea { id: _mouseArea
         anchors.fill    : parent