I'm running OS 10.5.8 on MacBook Pro, with 320 GB Hard drive. Earlier today, the computer crashed and I had to force quit by holding down the power button. Upon restart, I had zero KB available space, although before it crashed there was about 10 GB free. I deleted some large files, again creating about 10 GB free space, but over a period of around 5 minutes it went back down to zero, without me doing anything. Every time I delete files, the free space again diminishes rapidly down to zero. I still have access to all of my files, but obviously cannot do much without any free space. I have run ClamXav scan, but it has not found any infected files. I have restarted again, but it does not help. So I really don't know what to do now - any ideas??