Help Center/ Cloud Backup and Recovery/ User Guide/ Vault Management/ Expanding Vault Capacity
Updated on 2026-07-09 GMT+08:00
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Expanding Vault Capacity

During a digital transformation, data volume increases explosively, and the vaults also need to be expanded accordingly to store the backups. For example, during major shopping festivals, an e-commerce enterprise needs to back up critical data—such as transaction records—at high frequency. In such cases, the original vault capacity may become insufficient and must be expanded promptly. Likewise, a research institute may require frequent backups to ensure data security throughout the progression of its projects. As data continues to accumulate, adequate vault capacity becomes essential. If the vault reaches its maximum capacity, any subsequent backup operations for resources associated with that vault will fail. To prevent backup failure, you can expand the vault capacity based on service requirements.

You can expand the size of a vault without interrupting services.

Billing

After the vault capacity is expanded, the storage fee is charged based on the new capacity. For details about billed items, see CBR Billing. For details about pricing, see CBR pricing details.

Procedure

  1. Log in to the CBR console. Click in the upper left corner and select a region.
  2. Locate the target vault and choose More > Expand Capacity in the Operation column.

    Figure 1 Expanding vault capacity

  3. Enter the new capacity. The default value is the current vault capacity plus 10 GB. The value ranges from the current size plus 1 to 10,485,760 (in GB).
  4. Click Next. Confirm the settings and click Submit.
  5. Go back to the vault list. If the vault capacity in the Used/Total Vault Capacity (GB) column is greater than the original capacity, the vault capacity has been expanded.

Auto Capacity Expansion

If you want a vault to be automatically expanded when its capacity is used up, enable auto capacity expansion.

If this function is enabled, the vault capacity will be automatically expanded to 1.25 times its current capacity when its capacity is used up.

Auto capacity expansion does not take effect if it is enabled after the vault is full.

Yearly/Monthly vaults do not support auto capacity expansion.

  1. Log in to the CBR console. Click in the upper left corner and select a region.
  2. Locate the target vault and click its name.
  3. On the vault details page, enable Auto Capacity Expansion. By default, this feature is disabled. It becomes unavailable when the vault's used capacity reaches or exceeds 100% of the total capacity.

    • Enabled: When the vault's used capacity reaches or exceeds the limit, the vault automatically expands to 1.25 times its current capacity.
    • Disabled: The vault does expand automatically.

    If Auto Capacity Expansion is turned on, the function is enabled.

  4. (Optional) Disable Auto Capacity Expansion if you no longer need this function.

    If Auto Capacity Expansion is turned off, the function is disabled.

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Parent topic: Vault Management