I already pay $9.99 for 2 tb storage on my i phone but my computer device is now telling me that I also need to purchase more storage (2 tb) for my i cloud in order to back up?
iPhone 16 Pro Max, iOS 18
You pay US$9.99 for the 2TB iCloud+ space, not extra space on your iPhone. You can't increase the size of your device.
What's the difference between device storage and iCloud storage? - Apple Support
You can't use iCloud to backup your Mac. Where are you seeing this message? If your iCloud space is full you won't be able to add anything to it from any device, such as an iPhone backup.
purchasing storage for i phone and computer device
