I have recently discovered www.Carbonite.com, a service that backs up all the files on your computer continuously offsite so if your computer crashes, you don't lose all your data.
This service is only $49.99 a year or $89.99 for a two year subscription. You can try a two-week trial if you wish. If you have a crash, you just go back to the website and push a button to restore your data, which will take a few days, but you'll have it!
The initial back-up will take several days to get all your files copied, but after that, new information is backed up in a few seconds. $49.99 is a small price to pay for the security of having protected files!