Buy more iCloud storage
You automatically get 5GB of free iCloud storage for your photos, videos, files, and more. If you need more iCloud storage, you can upgrade from any of your devices.
Choose from a total of 50GB, 200GB, or 2TB. You can even share the 200GB and 2TB plans with your family. Your storage is upgraded immediately, and your monthly payment date reflects the purchase date for your plan. If you upgrade from one paid plan to another, we’ll cancel your existing plan and charge you the prorated cost of your new, larger plan.
You're billed every month for your storage plan unless you downgrade your plan. Each month you'll get an email to remind you of your upcoming payment.
Learn more here