So my 2008 MacBook was having trouble backing up to my Time Capsule recently and shortly thereafter I got a message saying that my startup disk was full (checked my Macintosh HD and it said that I had no free space). I booted into safe mode and deleted some files and I also ran Onyx to clean up other unnecessary files - that freed up about 8GB. Rebooted the computer and it ran ok for a few minutes before I saw the same message about the startup disk being full. Checked the Macintosh HD and it indicated that I had no free space again. Tried booting into safe mode again and I can't even get it to load my desktop and dock now. Any idea what I can try? I don't know if there's some sort of process going on that's taking up all of my free space or if it's a log file gone crazy or what. I'm on Snow Leopard by the way - should have mentioned that.