PhotoFast JBOD USB Thumbkey is a card reader with a plus. The CR-5500 is not your average microSD card reader hidden in USB thumbkey, but it is in fact a 4 slot microSDHD card reader that will turn all your cards into a single USB Drive using JBOD (Just A Bunch Of Disks) setting and let you build your very one 64GB (Max) USB thumbkey.