I finally got my free 2 GB additional storage for my Google Drive account.I got this additional storage after participating at the previous Google’s Security Checkup.
Even for now, I still have enough room for my Drive. I only utilise around 30% of my current 17 GB. But, since I’m planning of having my photos and some documents also backed up to Gooogle, I think it will increase very soon. Even if I need more room for storage, $1.99/month for additional 100 GB is still reasonable.