There is a way to get 1TB Google Drive storage for 2 years without paying a dime. And that path starts with reviewing Google Maps. One reddit user has reported in the r/Android subreddit that he was offered 1TB Google Drive storage after becoming rank 4 Google Map Local Guide. To become a rank 4 Local Guide you need to acquire 200 or more points by reviewing places, uploading images, rectifying wrong information, resolving queries posed by users in your area and adding new locations.
If this offer entices you, don't think that you can spam your way to gain ranks as a Local Guide. The tendency to help out people with thoughtful and genuine reviews must come naturally to you. You will enjoy this process, if you are someone who would generally post a Yelp review after visiting a place. Google actually filters out low quality and inappropriate reviews to deliver maximum value to their users and keep the ecosystem clean. In a nutshell - authentic reviews should get you to rank 4 along with free storage that's worth more than $200.
Do check out Google's official website if you are really interested in becoming a Local Guide and learning the added benefits.