Copy is a new cloud storage system which you can use for backup, share your files.
It will help you to sync your files between your computer, smart phone and tablets. You can also use this to share files between your computers with different operating systems.
Share files and folders
Share publicly or by private invite only
Share view-only or let people sync and edit
send as email attachment
The copy offers 15GB of free space for personal users, and a Tweet to get 2 GB space.
For a short time they are providing 5GB of additional space when ever you refer a friend. The main attraction is that when you refer someone, he also can get an additional 5GB space.