I fired up my new iMac today (my second day of using it), and was informed that my hard drive was full when it should have had about 200gb left. After poking around, I found a 200+gb file in my library/filesync called "iDisk.sparsebundle". From a quick google search I see that this might have something to do with Time Machine, which I actually don't have enabled yet. Given that I only have 10GB of space on my iDisk, the 200+gb file is weird. And please please please tell me that my new Mac didn't just download 200+GB of data through my Comcast connection! EDIT: 1 more detail - according to the desktop icon, my iDisc has a capacity of 922 GB. Crazy. Can anyone tell me if this is something I should be concerned about?