Microsoft OneDrive

Manage, store, and share your classroom documents all in one place, securely and easily, with Microsoft OneDrive. It’s a password protected hard drive in the cloud that you can use to store thousands and thousands of files. You can access these files whenever you are online, and you can give your students access to them too. This means everyone can access the material they need to get their assignments done; and turned in on time.
http://www.pil-network.com/Resources/Tools/