Perhaps the most amazing form of flash drive this is really a unique idea and design by LaCie. If you always have some keys in your pocket, then this is the perfect match for you. These flash drives can add an extra key and some GBs to your keyring. They are available in silver color, to match with the common key color. They impress their users by their High transfer speeds. For this size and style, I do not think it is much expensive.
