Apple has informed former MobileMe members via email that their 20GB iCloud storage upgrade has expired. Those users who haven’t purchased a storage plan and are still using more than 5GB of iCloud space have found that iCloud has temporarily stopped working. The service will work again once the amount of storage space used is reduced to 5GB or less, or if a larger storage plan is purchased. Apple has released a support article on the changes. Apple started notifying customers in early August that the free upgrade would expire and changes would need to be made to their iCloud storage. For more information on how to best reduce your iCloud footprint, check out this iLounge article from last week.