If you are rooted go to your root directory and look. The path has to exist (you have to be able to navigate via the path your trying to load android changed these recently) for example I can mount my internal simply by c: /sdcard/my game.img , but my external shortest path is c:/storage/1234-5678/mygame.img . use to be c:/extsdcard/mygame.img . secure storage came into play and it made the original path inaccessible.