I use Carbonite. It works quite well. There are two minor things I do not like. First, you cannot tell it to just go and backup everything that has changed using a single click. You must select each item. of course it will eventually discover and back these up on its own. Second, when accessing a file on its site it assumes you want to recover it as it assumes something happened to the original file. I would rather it just present these as files they hold, then let me decide what to do with it. Minor points, but points all the same.