I keep all my music on DVD's (140 gigs), and then I burn a large DVD folder of a few gig of pictures once I get a substantial amount (currently have 20 gig of pics on DVD), so I keep my HD pretty clean. Just the OS basically. Tonight I used "whatsize" to check where the larger files were and found out that on my clean computer I was still using 20 gig of space. I was like WTF... After deleting 3 gig of printer drivers I did not need, 7 gig of garage band, 3 gig of Idvd, and a few other misc gigs of crap my total usage is now 6.3 gig . 14 gigs of crap gone. I had already deleted language support later last year. Followed it up with onyX, rebuilding, optimizing, scripting. Reboot: BAM. Runs like a top! Big ass wide open hard drive with only 6 gig used.