Portable Storage Devices

Had a situation today where I needed to copy some files off a computer and didn't have a thumb drive handy.  Solution, I ended up using my cell phone which could have its SD card mounted as a hard drive.  This got me thinking and I put together a list of devices I could think of that can be used with your computer a hard drive aside from the typical.

1. Smart phones
2. MP3 players
3. Digital Camcorder
4. Digital Camera