A Microsoft file hosting and synchronization service.
Dear @Patrick Lee
Go to Services & subscriptionsFind your Microsoft 365 subscription, select Manage, and then Change how you pay. You can select an existing payment method or add the new card there.
You can also add or update your payment method directly from your Microsoft account:
https://account.microsoft.com/billing/payments
Microsoft provides the full instructions here: https://support.microsoft.com/en-us/accounts-billing/update-a-microsoft-account-payment-method
If your Microsoft 365 subscription was purchased through Apple, Google Play, or another third-party provider, the payment method needs to be updated through that provider instead.
Best regards,
Bence