Then there's encryption software to seal off your hard drive in case your computer goes for a walk.

FORBES: Magazine Article

This is similar to what happens when you delete information from the hard drive of your computer.

FORBES: Facebook developers accidentally excite the Internet with a 'Delete Account' option

Clickfree has evolved traditional storage technology applications into a modern-day solution that makes saving digital content as easy as connecting your computer via USB cable to the Clickfree backup drive.

ENGADGET: Clickfree gone wild at CES: 1TB drive, Mac support and online backup

You can drive by them or view them from your computer, or use your computer to organize your own movie star home tour.

FORBES: Google Street View, Celebrity Version

Simply plug it in to your computer, then connect the other manufacturer's hard drive and it instantly becomes a totally automatic Clickfree backup drive that searches, organizes and backs up all of your PC data and digital files.

ENGADGET: Clickfree Transformer Cable gives any USB hard drive auto backup functionality

External hard drives are a good way of keeping transient data off your computer's core hard drive, which should give your operating system some extra room to do its job more efficiently.

CNN: How to squeeze the most from your computer