I need to get a USB HD (500G or 1T) to backup Mr. Tb's old Dell Dimension 4300S (WinXP Home SP2) and my Lenovo T61 (WinXP Pro).

PC has only USB 1 ports, so it won't be fast, but he doesn't have much to back up.

I've been looking at the Iomega Prestige 2.0 drive as it comes preformatted for NTFS and I have an eGo drive that I find very easy to use, but I've read mixed (user) reviews of this drive.

I don't want to have to install any HD software. If I decide to use backup software I'd rather choose my own.

Has anyone used the Iomega drive? Any other suggestions? Reliability and ease of use are more important to me than price.