The person who purchased a computer for my condo association was computer ignorant. A Dell computer, with a maximum Hard disk capacity of one drive, was purchased. It has a CD-ROM drive though. Therefore, an external HD drive seems plausible. In the event of a major disk failure (cannot boot), can I recover, from an external drive, the back up image that it contains using the CD ROM drive? Does not the external drive require its own drivers in order to work? I would think so. Is this possible, please explain? I would hate to have a grave situation occur, only to find out that I cannot restore the drive.