what if 2TB is not enough storage?
How do I buy more than 2TB on icloud?
Question marked as
The only option currently available would be to also subscribe to Apple One. See the following from What happens to your iCloud storage when you sign up for Apple One - Apple Support
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 4TB of total iCloud storage.