What Microsoft giveth, Microsoft can taketh away. And so Microsoft did the unthinkable last year and announced it would be rolling back the free storage add-ons it gave users (base free 15GB storage going down to 5GB and camera roll bonus) and was clawing back the unlimited Office 365 storage to 1TB.
Understandably there was an uproar and now Microsoft has a setup a special webpage where you can ask them to keep your free storage levels.