You buy MP3s, take photos, write long love letters to Cloris Leachman, and you keep it all on your hard drive. If that hard drive crashes, you're done for. Unless you backed up. But what's the best way to back up? There are several ways to do this. We're going to discuss three. You can see some of them in action in our video.

1. External Hard drive
2. Network Attached Storage
3. Online service

Let's start with the external hard drive. Obviously, you don't want to back up to the same hard drive where the original files are. That's just silly.

The simplest method is to buy an external hard drive and back up to that. Our favorite here at CNET is the ClickFree portable backup. It makes the process of backing up as simple as you can imagine. The software is stored on the drive, so you just plug it in and tell it what to back up.

You can also do it yourself. If you have an old hard drive lying around, say from upgrading a notebook, just put it in a case. We show how to do it in this video on upgrading your hard drive.

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