Are you transfering data from ur pc-axim?
If so, I'd go with a sd card reader, even as a flash drive replacement. I got one, and its not much bigger than a regular flash drive. Mine has two caps on it. One to cover the usb plug, and another to cover sd slot. An sd card reader has 2 advantages.
1. It can be used in the axim (as well as tons of other devices) and a pc. Take the sd card out and u got a flash drive for ur ppc.
2. Upgradeable Memory!! With a future of microsd cards already compatible with the sd card slot, you should be able to get many years out of this thing, even when/if sd cards become obsolete.