-    public void syncFolderOperation(String remotePath, long parentId) {
-         long currentSyncTime = System.currentTimeMillis(); 
-        // perform folder synchronization
+    public void startSyncFolderOperation(String remotePath, long parentId) {
+        long currentSyncTime = System.currentTimeMillis(); 
+        setSupportProgressBarIndeterminateVisibility(true);
+       // perform folder synchronization