All about Google Drive

Google Drive is a file storage and synchronization service by Google
that was released on April 24, 2012. Google Drive is now the home of
Google Docs, a suite of productivity applications, that offer
collaborative editing on documents, spreadsheets, presentations, and
more. Rumors about Google Drive began circulating as early as March
2006.

Google Drive gives all users 5 GB of cloud storage to start with. A
user can get additional storage, which is shared between Picasa and
Google Drive, from 25 GB up to 16 TB through a paid monthly
subscription plan (2.49 US$ per month for 25 GB). Originally, these
subscriptions were truly treated as "additional storage" such that a
user with a 25 GB subscription would still retain the free 5 GB for a
total of 30 GB; however, in September 2012, Google announced it was
cutting the 5 GB of free storage from all paid users' accounts, so
that a user paying for 25 GB would be restricted to precisely 25 GB

read more at http://en.wikipedia.org/wiki/Google_Drive