USB Error, Firmeware Update Error

Good day
I have the following problem with the ARC-Droid.
When I connect a usb and want to format it, I get the error message Error Code 14.
It is also not possible to carry out a firmware update.
When I want to save a file from the ARC-Droid to a USB, I get the message: Can’t mount SD or USB drive
and when I try to open a file it says "Read U Disk error!

Hope you can help me further