iCloud: iCloud storage plan overview
When you sign up for iCloud, you automatically get 5 GB of free storage. Your iCloud storage is used for iCloud Backup, app data and documents stored in iCloud, and iCloud Mail (your @icloud.com email account). If you need more storage space, you can upgrade to a larger storage plan.
You can purchase the following amounts of iCloud storage:
10 GB additional (15 GB total): $20 per year
20 GB additional (25 GB total): $40 per year
50 GB additional (55 GB total): $100 per year
Instead of upgrading your storage plan, you can reduce the amount of iCloud storage you’re using. For more information, see iCloud storage management overview.