The billing method of a cloud disk depends on how it is created:
- For cloud disks created with Subscription (monthly or yearly subscription) instances, upfront payment is required for the service to be ready for use. For more information, see Subscription.
- For cloud disks created jointly with Pay-As-You-Go instances or separately created are billed on a Pay-As-You-Go basis. For more information, see Pay-As-You-Go.
You can change the billing method of a cloud disk, as shown in the following table.
|Conversion of billing methods||Features||Suitable for||Effective date|
|Subscription —> Pay-As-You-Go||Renew for configuration downgrade||Subscription cloud disks attached to Subscription instances. The billing method of the system disk cannot be changed.||Effective from the next billing cycle|
|Pay-As-You-Go —> Subscription||Upgrade configurations||Pay-As-You-Go data disks attached to Subscription instances. The billing method of the system disk cannot be changed.||Effective immediately|
|Switch from Pay-As-You-Go to subscription||The system disks and data disks attached to the Pay-As-You-Go instances.|