So, I decided to Disk Repair and Erase Free Space... using the Disk Utility application. When all is done -- my HDD now indicates that I have 0KB left ???? I quickly connected my FW800 external backup drive and started backing up my stuff -- just in case. Does any one know what is going on and why this is happening?? No application was running during the repair/erase processes. Funny that I can still use the mac while I have 0KB free space. I am afraid to put my powerbook to sleep. My system is a Powerbook 15" 1.25GHz, 1GB RAM, 60GB HDD with Mac OS X (10.4.4). Any help/comments/suggestion would be really appreciated. Thank you for your time!