Backing up your data is a pain, especially if you only want to back up certain things. You've got to either manually do it or have the foresight to set up a program of some sort that will do it for you, which is often a pretty big hassle. That's probably why so few people back their data up.

This Polaroid Backup is a smart little device that makes backing up your photos as easy as can be. Simply plug it into your computer and it'll automatically find and backup every photo on your system. It can store up to 40 GB worth of photos, which is a pretty high number unless you keep all your pictures in uncompressed RAW format straight from your camera. It's a neat device, one that we'd love to see coming in other flavors (Word documents? MP3s?).
— Adam Frucci

Polaroid, via Red Ferret