I too have an Iomega external USB (100meg) drive and it does work great. Problem is, the discs are rather expensive and I quickly found it too small to do much with. I went to an internal CDRW drive which certainly stores more and per meg is a lot cheaper. I think if I was in the maket for another external storage device I'd look long and hard at the Castlewood Orb. Guess it depends on how much you need to backup. Cheers.