ICloud storage
So if i buy the 50GB monthly payment and lets say I cancel next month do i still keep the 50GB or i instantly go back to 5GB and some storage gets lost?
iPhone XS Max, iOS 13
You go back to the 5GB plan. See the following from Downgrade your iCloud storage - Apple Support
If you downgrade or cancel your plan and your stored iCloud content exceeds your available storage, some of your data will not be uploaded into iCloud. Learn how to manage your storage by deleting information that you don't need anymore.