Hi, I just joined the site tonight. Hoping someone out there could advise me which USB Flash Drive I should buy. I am thinking of a 4GB on the basis that the more capacity the better. I want a fast transfer speed and I want to be able to transfer data including video(uploaded from my camera)from an XP PC to Vista PC and vice versa. I've seen plenty of reviews but there always seems to be some negative comments. I am not sure what U3 is for certain but I guess I probably don't need it (It appears to cause a lot of problems for some users.