Put your gta5 disc in & go to irisman, if game doesn't come up on its own hit the start button on controller, choose gamelist on sceen then all games... you should see it, hit triangle on the game & choose copy, it will ask you if you want to copy to hdd, if you choose no it will ask if you want to copy to usb external... I prefer external until I get it converted....
you will need to download:
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here is a real short very easy step by step video explaining everything... I used this many times & it works perfect...