You need to complete a security checkup for your Google account to receive an additional 2GB added to your Google Drive account.
As our way of saying thanks for completing the checkup by 17 February 2015, we’ll give you a permanent 2 gigabyte bump in your Google Drive storage plan.
We’ll be granting the storage automatically to everyone around 28 February 2015 and we’ll send you an email when your adjustment is complete.
UPDATE: Google Apps for Work and Google Apps for Education users are not eligible for the bonus storage but should still consider taking the Security Checkup.
http://googledrive.blogspot.co.uk/2015/02/safer-internet-day…
Why the article from blogspot website?
Any direct how-to/information from Google?