I really like Skydrive Explorer. It creates a virtual folder so you can drag files into it but if you wished to use Skydrive to backup data automatically you are out of luck.
Here’s a method to mount Skydrive as an actual network drive. It requires what I can only call a kluge. It requires you to download the new Microsoft Office 2010 Beta (later you will need the trail download). Creating a file and saving it to the web (File, Save and Send, Save to Web, Skydrive). Once you login to your Skydrive account you will see the address of the network. Copy that address. If your using Windows Vista or Windows 7 (of course you can use Windows XP although I do not remember how to do it) right click on “Computer” choose “map network drive” and follow the prompts to enter you email address and password. You may then use your Skydrive like any real folder. You may now use SyncToy or any other backup program with Skydive.
Here are the details how to do this from Download Squad.