HELP!!! Start up disk full???

Ok so this started happening a few months ago and I thought it was caused by downloading to much stuff. I get a message that says my start up disk is full blah blah blah. I deleted a bunch of stuff and cleared up like 5 gigs. It then happened again about a month later and I thought that was weird because I hadn't been downloading that much **** but I cleared some more stuff and didn't think much of it. Again about a month later(about a week ago) it did it again. At this time I thought it had to be somthing beside myself filling it up. I started searching for programs to clean up my harddrive a little and deleted somemore stuff. When all was said and done I had run "Ultimate Task" and had about 2.6 gigs free space. Two days ago I noticed I was down to 1.6 gigs but I had downloaded some PDFs for school and they were pretty big so didn't think much of it. Tonight I got home from work and there was that familiar message on my screen only this time when I deleted **** it was immediatly deleted not sent to the trash, and even then it showed zero k available. I deleted one of my movies to get enough free space to opertate, but I'm not sure how long it will last. Does anyone know what could be happening? Could it be one of my widgets? Is there a way to see what was the last thing written to the harddrive so I could possibly find the culprit? I am really at a loss what to do but I don't want to keep deleting my stuff to make room for information that I don't even know what it is. Also one last thing, does anyone know of a FREE(im poor in college ) program to defrag my harddrive? Thanks in advance for any insight.


Ben

 

So you are saying that 10.4 doesn't need to be defragged? How does that work? I will try to purchase a new harddrive next pay day but it is definately not the computer (First gen G5 duel 2.0/2.5 gig ram). Also thanx for the tip on Omnidisk Sweeper, I will try that as well. Thanx again for everyones help.

Ben