We have talked about getting Windows Live Essential tools for free, Windows Live SkyDrive is another great feel tool from Microsoft. It can store and backup your data up to 25GB free cloud space. Here is a way to make the most out of the 25GB free space, by mapping it on your computer as a virtual directory.
Step 1
Download the freeware called Gladinet Drive 
Step 2
Choose the free starter edition when install. 
Step 3
After you Done Install open up the application and Click “Mount Disk Storage or Web Storage As Virtual Directory” 
Step 4
Select a Driver Letter
Step 5
Select the type of Storage Provide “Windows Live SkyDrive” Note: as you can see this freeware also supports many other like Google Docs and Picasa etc 
Step 6
Enter your Windows Live ID and Password 
Step 7
Click Finish to create the Virtual Directory 
When it has done you should see the new Network Drive in your Windows Explorer. There you, you just got yourself another 25GB free space!
how to unmount drive with “gladinet drive”?
you can simply just exit the program and it will unmount the drive
You can use the virtual directory manager in gladinet to dismount the virtual drive. The same virtual directory manager can be used to mount Google Docs/Google Picasa/Amazon S3 and etc.