Things You'll Need
Instructions
Turn on your PlayStation 3 and wait for the dashboard to load up.
Connect an external hard drive via an USB into the USB slot on the front of your PS3.
Press right on your controller and select "Settings," then choose "System Settings."
Scroll down the list and select "Backup Utility."
Select the "Backup" option, then choose "Yes." Your PlayStation 3 will now be backed up on the external device.