Flash drives are pretty easy to misplace, and even many that come with loops, hooks, or holes to connect them to keyrings can often get disconnected. That's why we like LaCie's iamaKey. Since it's designed to look like a key, and has a sturdy metal case, it'll fit on your keyring, and you'll never leave it behind of lose it (unless you lose your keys). One downside: iamaKey is USB 2.0, so file transfers may be slower than they would be using a flash drive designed for newer USB 3.0 ports. If LaCie comes out with a USB 3.0 version, you'll probably want to change your keys; no locksmith required.