You can access your subscription and all its details from your Workspace settings page.
Go to My files > Workspace settings.
Click Manage subscription.
If you need to change your payment card, or use a different payment method:
Click Add payment method.
Select the type of payment method and enter the details.
You can also remove any previous payment methods or set a new default payment method by clicking the ⋯ menu beside the payment method.
📝 Note: If you have an active subscription, you need to have at least one payment method saved.
If you're having difficulties adding a card or making a payment, check with your financial institution first to confirm the status of your card, or if it supports online transactions.