I have a Mac Mini 1.66 with an 80GB HDD. That disk is nearly full. Need to move some stuff off of it. I woke it up and noticed a Startup Disk nearly full error message and checked my disk. 225 MB free space. The other day it had nearly 2GB. I haven't rebooted in a while. 1st thing I emptied Safari's cache. Launched activity monitor and watched my disk go back up to 257 MB and then slowly drop .2MB at a time back down to 205 or so over a 5 minute period. I can't figure out what is randomly filling up disk space like that. I checked the activity monitor for all processes and don't know what most are so I didn't know if I should quit any. I quit all open apps and rebooted and by disk space jumped back up to 1.37 GB. Activity monitor shows the space holding steady. One item in my processes that I found wierd was QuickBackBackgro, I searched the Apple site and google and no hits. Anyway, my disk hasn't changed since then. I had this issue once on my G4 and I remember that it was some enormous swp file that I had to dump. However I don't think Tiger has that issue. I remember the Applecare tech explaining at the time it was an OS issue that I would assume has been resolved. Any ideas on what might have done this. Is it just that I hadn't rebooted in so long. Or maybe other issues. I tried using the finder to search for all files greater than 100MB and it didn't return many results when I knew there were plenty more. Do I need to index my drive first or something. Any help would be great. Thanks.