
After notifying former MobileMe customers of an impending iCloud storage downgrade in August, the complimentary 20 GB of iCloud storage Apple has offered to those customers for the past two years has now expired.

Users who are currently over the free 5 GB limit following the expiration of the complimentary 20 GB will see such features as iCloud Backup, Documents in the Cloud, and iCloud Mail cease functioning until they bring their accounts under the lower 5 GB limit.
Apple replaced MobileMe with iCloud in 2011, giving paying MobileMe customers an extra 20 GB of iCloud storage as a complimentary gesture. The additional storage was originally set to be discontinued in September 2012, but Apple decided to extend the offer, giving MobileMe users another year of extra storage free.
Article Link: Apple Ends Complimentary 20 GB Storage Plan for Former MobileMe Members