Question Electric piano USB blocked

Nov 14, 2021
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Hello, I just purchased a cheap electric piano to learn on. The back has a plug that days USB but is covered by some sort of plastic, I'm not sure if I. Supposed to break it or what? Why would it be there is I couldn't actually plug in a usb?
 
Without knowing what "cheap electric piano" you purchased, it could be just a stock case for additional components in a "higher" priced model.