I have been trying to determine what type of expansion pack to get with a compaq ipaq h3670. There are pc cards and compact flash memory cards. The compact flash cards will save their data no matter what when you take power away. So can you take out say a 2 gig pc card from the unit and will it still have all of its info on it or will it get erased. Probably a dumb question but i'm confused about the differences between flash memory and pc card storage cards. Any help would be great