How can I buy one time iCloud storage

Hello badria48,

I am afraid you cannot buy iCloud for a one time purpose. You can only subscribe to a monthly plan, which can be canceled at anytime. I’ll leave a step by step guide link below to help you out, and links to Apple Support and other helpful things

Upgrade to iCloud+ - Apple Support

Sincerely,

Captain

Links:

Apple Support

Direct Categories:

Mac Support

iPad Support

iPhone Support

Apple Watch Support

Apple TV Support

AirPods Support

Apple Music Support

Other Helpful Direct Links:

Apple Repair Support

Forgot Apple ID or Password Support

Billing and Subscription Support

Apple Support YouTube Channel

Apple YouTube Channel

iCloud+ is a monthly subscription for requirements past the 5 GB provided free, but it is possible to rent for a month and then downgrade. That does mean the added storage will no longer be available after the subscription expires or is downgraded.

What particular problem or requirements are you working with here, where you find yourself needing one-time storage?

You can't, it's a monthly subscription