Ahh, good call. I never though of a thumb drive. I would tell you to go with a thumb drive over a zip disk. If you want to carry along you thumbdrive, you can use it on 98% of all computers. (Arbitrary percentaage, but it seems about right. The 98% being computers with USB, and 2% of computers without. Believe it or not, I still see them)and with a Zip disk, you can only use it on computers with that drive. And thumb drives are cheaper.