Index: sources/storage/FileHandler.cpp
===================================================================
diff -u -r79a6cfcb10472261f3ec26eaf0baf6f1245cd311 -r86e9dfbff50cb7e16fd94c16c1c818cef3b47eac
--- sources/storage/FileHandler.cpp	(.../FileHandler.cpp)	(revision 79a6cfcb10472261f3ec26eaf0baf6f1245cd311)
+++ sources/storage/FileHandler.cpp	(.../FileHandler.cpp)	(revision 86e9dfbff50cb7e16fd94c16c1c818cef3b47eac)
@@ -272,7 +272,11 @@
     if (path.at(lastIndex) == "/") path.remove(lastIndex, 1);
     // check to see if the path in the list of mounted rootPaths
     /// DEBUG: qDebug() << " +++++ " << QStorageInfo::mountedVolumes();
-    foreach (const QStorageInfo &storage, QStorageInfo::mountedVolumes()) {
+    // FIXME :  This function blocks the Device controller thread
+    //          It has been observed during the USB plug test and getting the drive info(space) that
+    //          immediately after the mount this function laggs to get the information for about 2-5 sec.
+    auto mountedVolumes = QStorageInfo::mountedVolumes();
+    foreach (const QStorageInfo &storage, mountedVolumes) {
         if (storage.isValid() && storage.isReady()) {
             if ( storage.rootPath() == path ) {
                 if (vIsReadOnly) *vIsReadOnly = storage.isReadOnly();