Look for an app called DropN9 in the store, also try out
www.dropbox.com i think they have apps for most of the desktop os's

This is cloud storage, which was really there from the start in many sites like mediafire... Cloud computing is where most of the computation is done by a server, so if you have a network thats fast enough, you can do a lot more with a less powerful system. For more info you can google cloud, and follow the wiki link...