I have several questions: 1) Can I use an external USB hard drive as the source for my disk images? (ie - will I be able to restore an image from this external HD?) 2) I make an incremental image every week on top of the full image I created 4 months ago. I'm almost out of disk space. Can I literally just delete these image files (via Windows Explorer) and start fresh with a new full image? Or will this cause problems? Is there a better way to this method of "starting over" that I don't know about? Thanks in advance for your help.