My iCloud account is full, need to provide payment method

Hi, and welcome to the Apple (user-to-user) Community.

Re: My iCloud account is full

How to: Manage your iCloud storage – Apple Support

How to:

Archive or make copies of the information you store in iCloud - Apple Support

___________________________________________________

Re: need to provide payment method

Your Apple ID is the account that you use to access all Apple services and make all of your devices work together seamlessly. After you log in, you can use the App Store, iCloud, iMessage, Apple Music, Apple TV+ and more.

Check what payment methods Apple can accept in your country or region:

Payment methods that you can use with your Apple ID – Apple Support

If your credit/debit card is one that Apple accepts, 

you can list it in your Apple Account

How to:  Add a payment method to your Apple ID - Apple Support

or

How to: Add money to your Apple Account balance - Apple Support

_______________________________________________________________

Re: iCloud data subscription

iCloud+ plans and pricing

* Not all features are available in all countries or regions

How to: Upgrade to iCloud+ – Apple Support

Support if needed:

iCloud Support

or

Subscriptions and Billing - Official Apple Support

All the best :-)