Chony:

Been there and done that. If you have connected a pc to your keyboard and formated using the keyboard, you get nada but error.

To reverse it I took the HDD out of the keyboard hooked it to the computer using a connector (HDD to USB) formated fat 32 reinstalled in the keyboard. Keyboard recognised and allows you to format back.

If you got a connector (they are about 8 bucks) worth a try.

pose