I can confirm this bug, but you need to clarify it. The only folder, i am able to sync on my galaxy s4 is the one in: sdcard/extsdcard/Android/data/**bittorrentsyncappfolder***/files/ and here i can create my synced folders. It is in fact a problem. The app has no rights to create a folder an any other location. And even if i move the created folder to the root of the sdcard, i am not able to sync it.