exceeding iCloud storage
What if I buy more iCloud storage, fill it up and then cancel my subscription? Will the files be deleted?
iPhone 11 Pro, iOS 14
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Click on the link to read how to "Downgrade or cancel your iCloud storage plan" on an iOS device, a Mac, or a PC. --> https://support.apple.com/HT207594
"What happens when you decrease your storage plan
When you downgrade your iCloud storage plan, the storage decrease takes effect after your current monthly or annual subscription ends.
If you downgrade or cancel your plan and your stored iCloud content exceeds your available storage, new photos and videos don’t upload to iCloud Photos, files don't upload in iCloud Drive, Messages in iCloud don't update, and your iOS devices don't back up. Learn how to manage your storage by deleting the information that you don't need anymore.
If you downgrade to the free iCloud Storage plan, you'll have 5GB of storage."