Iomega would be a popular brand as well, but I suspect that you can buy a portable hard disk from any of the lesser brands and you'll still have a reliable piece of equipment. For example, I found an Astone hard disk box with a 40GB hard disk installed at Funan IT Mall, Challenger Super Store, and it cost me around $169. There were even cheaper ones available, but the warranty on this was the thing that made me lean towards its purchase...my Dad could take it back to Australia and there was still a service center there within easy reach because it was in the same state (Victoria).