E Book USB Port

[getmymd]

I am new to this forum but need help with some code. This is not for school, so help would be appreciated. I have an E Book Reader (Chinese Hanlin w/ Android OS). I need to be able to password protect the USB port, so nothing can be downloaded onto the E Book Reader without The Password. The E Book Reader needs to be fully functionable, when not connected to a computer, so code similar to Bit Locker Drive Encryption won't work. Any thoughts or ideas would really be appreciated!