Tried to install app updates and received message that I have no more device space! I have tried to shut down nonessential/unused apps and receive vicious warnings against doing that. There's a fat Miscellaneous Files category. Can I delete Miscelleaneous Files? Otherwise how do I increase my device storage? I've moved all files to my SD card that I'm allowed. This is less than a year old Samsung 4 and I don't run that many apps on it. Help?