Okay first off I have a iMac with a 160gb hd and recently upgraded to leopard. So I am running out of space on my hard drive so I am deleting unneccesary files. I thought I solved my space issue and I see that I still have 30 gigs free. So I use whatsize and find that I only have 70 gigs of files on my hard drive. So I have like 40 gigs of space just gone. And this is after a fresh startup. So any advice?