[Solved] Help!!

[RagnaTheGrey]

so i bought drastic and it was working great but now any time i try to open a rom it says "The file you tried to open is not a valid rom"
they where working fine before so i dont know whats wrong im using nvidia shield android 4.4.2 any help would be great thanks!

[Lordus]

Files were somehow corrupted when transfering multiple files at once to the device.