Dudes...there's a backup utility right in the Ps3 XMB....Hook up an external larger than your PS3 internal drive, and just back it up regularly, you'll be fine if you do that....if your Ps3 ever crashes, there's a restore utility as well to bring all the data back
Good day
I said Good Day
Just waiting for that PS Vita to come out so I can play some full featured games on the go with that beautiful screen and control scheme...