Flash Drive Auto-Sync

Flash drives are those little hand-held USB drives that allow you to easily move files around from one place to another.

Problem: Flash drives are very easy to lose, or damage, which means the files are lost. Due to their temporal nature, people do not usually think to back up these files.

Solution: A flash drive that creates a special folder on your computer, and every time you plug in the flash drive it updates the folder to make sure it contains precisely all of the files that are on the flash drive. (An option would also have it wait to sync the files until the middle of the night, or when CPU cycles are sufficiently low).

Disclaimer: This idea was suggested to me by a friend.