You can chuck as many 50GB increments on your 200GB if you need it.
I can only swap that out for a 200GB increment. This is weird because I'm sure you used to be able to do that.
So I jumped 5, 50, 200, 2000.
>After you subscribe to Apple One, you can buy more iCloud storage if you need more. With both Apple One and an iCloud+ plan, you can have up to 14TB of total iCloud storage.