My data isn't that precious. I mean, sure, I like my photos and my music, but if someone else accesses them it's no big deal. Other people aren't so easygoing. For them, there's the Aegis Padlock Secure Hard Drive.
This bad boy has a keypad right on the top, forcing you to enter a code to access the data. Once plugged in, it featuer AES-128 or 256 bit encryption to keep everything nice and secure. The drives run from $100 to $160 depending on the size and encryption, which isn't too bad for such a secure external hard drive.