I'm curious about using external storage to install games as the internal is full after installing 3 games. I plugged in an external powered drive and it shows up in es file explorer but I can't copy anything to it and it won't mount in settings either. I'm guessing only thumb drives work? Do they have to be fat32 or ext 4? I just want the option to copy all of my games and files to bigger storage. Any help would be appreciated.