Much like a similar promotion last year, Google users can claim 2GB of permanent drive space for free by completing a simple security checkup. In an improvement to the offer, there is no longer a waiting period before the extra Google Drive space is applied. It will show up immediately. Furthermore, if you participated last year, you can receive the extra 2GB again.
The promotion first ran last year to mark Safer Internet Day on February 9th. Google is yet to confirm this year's promotion, however it appears to be running in much the same way.
To complete the check up, users will be asked to confirm their account recovery information, connected devices, and app permission settings. The process can take a matter of seconds. Users have confirmed seeing the extra drive space has been applied to their account after checking their storage settings. It is listed as, "2016 security check-up bonus".
It is unclear when the promotion will end, though last year users had until February 17th to claim their 2GB. To obtain the extra Google Drive space, complete the security checkup here.