those are only 4gig, but thats all I really need on a quick portable drive, anything more than 4g, and it's probably on my 1terra external harddrive, thats usually in my bag as well the 4g is good for keychains and quick copies.
I can tell you up front..memory sticks/flash drives are a great little investment. I can't count how many times I thought I'd permanently lost important files and memories when I remembered I had them on a flash drive.