mySites cloud storage is like PC hard disk, but it's located in internet. User can store it's music, video, images, etc. to web and access them from anywhere where internet connection is available.
To begin using mySites cloud storage you need mySites account, you can create on in www.mysites.com After you have created your account you can use it from dazzboard iGoogle gadget or Facebook application, just drag&drop content to your cloud storage.