Aaron Dickey said: >I wish I could provide some actual _information_ about my problem, but >I'm afraid I can't say much except the basic facts. I'm using a 17-inch >iMac, 512MB, 80GB. In practice, of course, that 80GB was more like >60-65GB, which is fine. Except that sometime during the last 3 days or >so (if that long) around 40GB of that space has simply disappeared. This problem is covered on my Web site: How To Deal With Common Macintosh OS X 10.2 Jaguar Problems http://www.macattorney.com/tutorial.html under item # 13. Your disk can fill up with log files. This can happen even if you leave your Mac on all the time, if you let your Mac go to sleep. Even if you don't put your Mac to sleep all of the time, keep in mind that there are daily, monthly, and weekly maintenance routines. If your hard drive has always been missing a huge chunk of space, it might be a good idea to run Disk Utility and see how many partitions there are. Shockingly, sometimes Apple blocks off a portion of a brand-new drive. See: http://docs.info.apple.com/article.html?artnum=11148 If none of this helps, let me know. There are other, less likely, possibilities. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Claiming that the Macintosh is inferior to Windows because most people use Windows, is like saying that all other restaurants serve food that is inferior to McDonalds'.