The Windows Briefcase feature has been around for a long time, but a lot of users don't take advantage of this feature because they don't know what it does or don't see how Briefcase makes backing up and synching all your important files a snap to do.
Sure, you can manually save all your documents onto a flash drive from your desktop computer, but every time you make a change to a document on your desktop you have to remember to backup to the flash drive; it becomes cumbersome to do this manually over and over again.