1. Attach the hard drive to the PlayStation 3. To do so, connect the hard drive's USB cable to the PS3's USB port. The PS3's USB ports are on the front side of the console.
2. Turn on the PS3 and an attached controller. The easiest way to do this is by pressing the PS button on the controller.
•You can also press the power button on the PS3 and the controller individually.
3. Scroll left to select Settings. It's near the far-left side of the PlayStation 3 menu.
4. Scroll down to select System Settings and press X. It's near the bottom of the Settings menu.
5. Scroll down to select Backup Utility and press X. This option is near the middle of the System Settings menu.
6. Select Back Up and press X. It should be the first option on this page.
7. Select Yes when prompted, then press X. This will take you to the hard drive selection page.
8. Select your hard drive's name, then press X. Unless you have multiple USB drives connected, your hard drive should be the only option here. Doing so will back up your PS3's data to the hard drive.
•You can't run games off of the hard drive, but you can back up your existing game files to the hard drive and then delete the games from your PS3's internal drive to clear up space.
that's yall you have to do.