UNLESS YOU'VE GOT a couple of mirrored hard drives to ensure that a disk failure won't send all of your precious data to that great bit-bucket in the sky, you need to backup your data.

Surely some of your data is very important to you, whether it's email, school or work papers, professional records and works in progress, financial and tax records, photos, music or films, whatever. For me, it's about 10 years of professional output plus email and some digital photos and music. I'd hate to lose all of that, so I make sure that I back up all my data regularly.

If you're like most of us, you might have a CD or DVD burner in your system, and that's fine for periodic backups. But how often do you remember to do that, burn a backup CD or DVD? Once a month? Once every six months? Maybe once a year, if you're lucky? It's better to have an automatic backup process.

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