How do I change the credit card used for my icloud storage

Hey there Passingthroughagain,

Thanks for reaching out to the Apple Support Communities.

Your iCloud+ plan would use the default payment method that you have assigned to your Apple ID. If you need to update your payment method, check out the steps in the following resource for help: If you need to change or update your Apple ID payment method - Apple Support

Update your payment method on your Mac

1. Open the App Store.

2. Click your name or the Sign In button.

3. Click Account Settings.

4. Next to Payment Information, click Manage Payments. (If you're using an older version of macOS, click Edit next to Payment Type.)

5. Click Add Payment, then enter the new payment method. Click Done.

Let us know if that's able to help.

Have a great day!