So with all the free goodies on psn and some games that I have been wanting to download  as of right now I have 5 gigs left on my ps3. I looked for stuff to delete but it was all just old saves which didn't help very much. Besides I have been wanting to upgrade for a while now so it looks like I have to. So yeah if you guys could help that would be awesome. I have a 120 gig ps3 slim model if that makes any difference.

Let me type let me google that for you...

All you have to do is buy a laptop sized hard drive.  
 
 The switch is really simple, just unscrew the old one, take it out and put the new one in. Easy. You'll have to actually look up how to back up your old saves and such.