Paper Wallet on USB?

Is there a reason to print out your paper wallets? If I wanted to, could I just copy the private key into a text file, save it as a pdf, or screenshot it and then put it on a flash drive that is exclusively used for storing that wallet key? Would there be any drawbacks to doing this over printing it out? Any advice/help you guys could give me would be greatly appreciated as I am relatively new to all of this cryptocurrency business.