It has happened to many of us. Your computer crashes and with it goes your data. Sadly, this happened to me twice in a period of 3 weeks. Sadly, I was not using a backup service. However, I did see it coming so I had backed up nearly all of my files before it happened. I was lucky. Most of the time the files die with the computer, never to be retrieved.
That event changed how I look at my files. I know how important it is to back them up — daily! I didn’t want an external harddrive as I feared if my house burned down, that would too and I’d still lose my files. I opted for an on-line service. I did a lot of research and ended up at Mozy. We have a personal account and can back-up 3 computers. This really came in handy when we had to buy a new PC and just downloaded the files we needed to our new PC (so it is good for more than just harddrive crashes).
Right now, you can save 10% off of your purchase with the code BACKTOSCHOOL at checkout. The charges are very reasonable, considering how pricesless some of your data can be. I know that losing photos of my kids would break my heart, because I can’t ever get those back again.