Google Drive Features

Google Drive is available for PC, Mac and Android devices.  It will soon be available for iPhone and the iPad.  Google Drive accounts start with 5GB of free drive space, extra space is available  at a cost of $2.49 per month for 25 GB or $4.99 a month for 100 GB of drive 
space.  Other features :

• Create, collaborate, comment and share documents instantly.
• Each save creates a new revision of the file.  Saves will be kept for 30 days.
• Assign permissions (edit, view, comment) to files and folders in your drive space.
• Direct link to documents in Google Drive.
• Or use the easy access and sharing within Google+ Circles.
• Open files in your browser (over 30 file types are supported) including files within Apps.
• Powerful search function, text in scanned documents and objects in images recognition.  

Learn More:
Google Drive for Personal Use
Google Drive for Business