I'd buy a pre-formatted external HD, also good to backup everything on periodically incase you brick your system or corrupt a file (done that here before). Just go to the settings in your PS3 and select "backup data" or something like that. When it's done (it will take around 30 min depending on how much you have on your HD) just power the system down completely, unplug everything, remove old HD, install new one (do NOT tighten the screws holding the hd in the tray tight, you may want to remove it later on, just snug, no extra turns, you'll regret it) plug everything back up, power on, format new HD (this is super fast), go to system settings, and choose "restore system", done, enjoy.