Storage Space

Creating an OBS bucket is free. You pay only for the storage capacity and duration you actually use. The billing items vary depending on storage classes. For details, see Table 1.

For more information about storage classes, see Storage Classes.

Billing Description

**Table 1** Storage space billing
Category	Billing Item	Description	Billing Mode
Storage space	Standard storage	The space occupied by data in the Standard storage class, using single- or multi-AZ deployment. For differences between the single-AZ and multi-AZ, see What Are the Differences Between the Single-AZ Mode and Multi-AZ Mode in OBS? Storage duration: indicates the number of days during which data is stored in OBS. Objects smaller than 64 KB in size will incur storage fees as if the objects were 64 KB. For those no less than 64 KB in size, you are charged for their actual size.	Pay-per-use Yearly/Monthly
	Infrequent Access storage	The space occupied by data in the Infrequent Access storage class, using single- or multi-AZ deployment. For differences between the single-AZ and multi-AZ, see What Are the Differences Between the Single-AZ Mode and Multi-AZ Mode in OBS? Data that is stored for less than 30 days will be charged for a full 30 days. For data stored over 30 days, you are billed based on the actual storage duration. If objects are deleted or transitioned to another storage class before they have been stored for 30 days, you still need to pay for the remaining days. The fee for the remaining days is calculated as follows: Unit price of Infrequent Access storage x Capacity x (Remaining days/30). Objects smaller than 64 KB in size will incur storage fees as if the objects were 64 KB. For those no less than 64 KB in size, you are charged for their actual size.	Pay-per-use
	Archive storage	The space occupied by data in the Archive storage class. Data that is stored for less than 90 days will be charged for a full 90 days. For data stored over 90 days, you are billed based on the actual storage duration. If objects are deleted or transitioned to another storage class before they have been stored for 90 days, you still need to pay for the remaining days. The fee for the remaining days is calculated as follows: Unit price of Archive storage x Capacity x (Remaining days/90). Objects smaller than 64 KB in size will incur storage fees as if the objects were 64 KB. For those no less than 64 KB in size, you are charged for their actual size.	Pay-per-use

Overwriting objects in the Infrequent Access or Archive storage class works the same as deleting and then uploading these objects. This will incur extra storage fees.