Am I charged after I activate Apsara File Storage NAS?

No, you are not charged if you only activate Apsara File Storage NAS. You are charged when you write data to NAS file systems.

How can I stop being charged for Apsara File Storage NAS?

You cannot stop being charged for Apsara File Storage NAS by deactivating the service. This is because deactivating the service can result in business disruptions.

If you no longer want to use Apsara File Storage NAS, you can delete all mount targets of each file system, and then delete all the file systems. Then, you are not charged from the next billing cycle.

Why are the used storage space and the fees for a file system unchanged after I delete data from the file system?

The data size that is displayed in the Apsara File Storage NAS console is unchanged because a latency exists between two consecutive data updates. A bill is generated on an hourly basis. The bill of the previous hour is displayed in the Apsara File Storage NAS console.

How am I billed when I upload data to or download data from a file system?

  • Data migration from an on-premises storage system to Apsara File Storage NAS

    To enable access from the Internet to a NAS file system, you must configure an Elastic Compute Service (ECS) instance as an intermediate node. The ECS instance must allow access from the Internet. You are not charged for the inbound traffic of an elastic IP address (EIP). However, you are charged for the outbound traffic of an EIP. In this case, you are charged for the data that is downloaded from a NAS file system. However, you are not charged for the data that is uploaded to the NAS file system. For more information, see EIP billing.

  • Data migration between Object Storage Service (OSS) and Apsara File Storage NAS
    • If you read data from or write data to the Infrequent Access (IA) storage medium of a NAS file system, you are charged for the read and write traffic. For more information, see Billing of IA storage media.
    • You are charged for API requests when you call API operations to read data from or write data to OSS buckets. For more information, see API operation calling fees.
    • You are charged for the Data Transport service. For more information, see Pricing.
  • Data migration between NAS file systems
    • You are charged for the traffic that is generated when you read data from or write data to the IA storage medium of a NAS file system. For more information, see Billing of IA storage media.
    • You are charged for the Data Transport service. For more information, see Pricing.

How am I billed for the storage space of a NAS file system?

  • General-purpose NAS file system

    You are billed for a General-purpose NAS file system on an hourly basis based on the maximum storage space that is used. The used storage space indicates the total size of all files in the General-purpose NAS file system, excluding the size of directories. The basic storage unit is 4 KiB. If the size of a file is not a multiple of 4 KiB, the billed storage space is rounded up to the nearest multiple of 4 KiB. For example, if the size of a file is 3 KiB, you are billed for a storage space of 4 KiB.

  • Extreme NAS file system

    You are billed based on the capacity that is configured when you create an Extreme NAS file system.

Why are the storage usage records displayed on my bills different from the storage usage records displayed in the console?

After you enable the recycle bin feature for a General-purpose NAS file system, you are billed for the temporary files in the recycle bin.

When you check the storage usage records, you must ensure that the temporary files in the recycle bin are included. Therefore, the storage usage of a General-purpose NAS file system is equal to the used storage space of all files in the file system plus the used storage space of the temporary files in the recycle bin.

Can I change the billing method of an Extreme NAS file system from subscription to pay-as-you-go?

No, you cannot change the billing method of an Extreme NAS file system after you create the file system. After a subscription Extreme NAS file system expires, you can create a pay-as-you-go Extreme NAS file system and migrate data from the subscription file system to the pay-as-you-go file system.

Why do I still have overdue payments after I purchase a storage plan?

After you purchase a storage plan and attach it to a file system, overdue payments may occur due to the following reasons:
  • The used storage space of the file system exceeds the capacity of the storage plan.

    For example, you have purchased a storage plan (100 GiB, one month) and attached the storage plan to a Performance NAS File System A. During a billing cycle, the used storage space of File System A is 180 GiB. The fees for 100 GiB of storage space are deducted by the storage plan. Then, the pay-as-you-go billing method is applied and you have overdue payments for the 80 GiB of excess data. To prevent the overdue payments, you can upgrade the storage plan. For more information, see Manage storage plans.

  • The storage plan expires.

    For example, you purchased a storage plan (500 GiB, one month) at 10:39:41 on August 5, 2020, and attached the storage plan to a file system. The storage plan expires at 00:00:00 on September 6, 2020. After the storage plan expires, the pay-as-you-go billing method is applied and then you have overdue payments. To prevent the overdue payments, you can renew the storage plan before it expires. For more information, see Manage storage plans.

  • The lifecycle management feature is enabled and the files that are stored in an IA storage medium are accessed.

    If a file meets the rule that is configured in the lifecycle management policy, the file is dumped to an IA storage medium. When you read data from or write data to the IA storage medium, you are billed for the read and write traffic based on the pay-as-you-go billing method. Then, you have overdue payments. For more information, see Billing of IA storage media.

  • The billing system has a latency.

    After you complete the payment, the storage plan immediately takes effect. However, a bill for the previous hour may not be immediately generated. For example, you receive a bill at 10:00:00. The bill may contain the fees that were incurred from 07:00:00 to 09:00:00. We recommend that you check the time at which the fees are incurred after you receive the bill.

You can view the usage and fees of your file systems in the User Center. For more information, see View the billing and usage details.

What is the relationship between a storage plan and the capacity of a file system?

  • Storage plan

    Storage plans are used to deduct only the fees for General-purpose NAS file systems.

    Note If you require a storage plan with a higher specification, you can upgrade the storage plan. For more information, see Manage storage plans.
  • Capacity of a file system
    The capacity of a file system is the space that is provided by the file system to store data.
    • The maximum capacity of a Performance NAS file system is 1 PiB.
    • The maximum capacity of a Capacity NAS file system is 10 PiB.
    • You can select the capacity of an Extreme NAS file system when you purchase the file system. The maximum capacity of an Extreme NAS file system is 256 TiB.
    To view the used storage space of a file system, perform the following steps:
    1. Log on to the NAS console.
    2. In the left-side navigation pane, choose File System > File System List.
    3. Find the file system, and click the ID of the file system in the File System ID/Name column or click Manage in the Actions column. In the Basic Information section of the details page, view the used storage space and the capacity of the file system.

      On the details page of a General-purpose NAS file system, the Usage parameter indicates the maximum storage space that is used for the previous hour.

      In Linux, you can run the df -h command to view the used storage space of a file system. If the used storage space is 0, no data is stored in the file system.

Is the capacity of a file system limited to the capacity of a storage plan?

No, a storage plan that is attached to a file system does not limit the capacity of the file system. However, the used storage space of the file system cannot exceed the maximum capacity of the file system. The maximum capacity of a Performance NAS file system is 1 PiB. The maximum capacity of a Capacity NAS file system is 10 PiB. If the used storage space of the file system exceeds the capacity of the storage plan, the pay-as-you-go billing method is applied to the excess usage.

For example, you have purchased a storage plan (100 GiB, one month) and attached it to a Performance NAS file system. During a billing cycle, the used storage space of the file system is 180 GiB. The fees for 100 GiB of storage space are deducted by the storage plan and you are billed for the 80 GiB of excess usage based on the pay-as-you-go billing method.

When does a storage plan take effect?

A storage plan immediately takes effect after you complete the payment for the storage plan.

What can I do after a storage plan expires?

You can renew the storage plan. If you do not renew the storage plan, the pay-as-you-go billing method is applied. To prevent the impact of overdue payments on the NAS file system, you can enable the auto-renewal feature. For more information, see Manage storage plans.

What happens if the used storage space of a file system exceeds the capacity of a storage plan?

If the used storage space of the file system exceeds the capacity of the storage plan, the pay-as-you-go billing method is applied to the excess usage.

For example, you have created a Capacity NAS file system and attached a storage plan (500 GiB, one month) to the file system. The maximum used storage space of the file system is 550 GiB from 07:00:00 to 08:00:00 on August 1, 2020. The fees for 500 GiB of storage space are deducted by the storage plan and the pay-as-you-go billing method is applied to the 50 GiB of excess usage.

Can I purchase a storage plan if I do not attach it to a file system?

No, you cannot purchase a storage plan if you do not attach it to a file system. When you create a storage plan, you must attach it to a file system. Each storage plan can be attached to only one file system. If you require a storage plan of a higher specification or longer duration, you can upgrade or renew the storage plan. For more information, see Manage storage plans and Manage storage plans.

How can I detach a storage plan from a file system?

You cannot manually detach the storage plan from the file system. However, if the file system is deleted, the storage plan is automatically detached.

How can I change the file system to which a storage plan is attached?

You must delete the file system to detach the storage plan and then attach the storage plan to another file system.

Can I apply for a refund after I purchase a storage plan?

Yes, you can apply for a refund if no data is stored in the file system to which the storage plan is attached.In this case, .

Can I attach a storage plan to an Extreme NAS file system?

No, you cannot attach a storage plan to an Extreme NAS file system. You can attach a storage plan only to a General-purpose NAS file system.to deduct fees for the file system. For more information about the billing of Extreme NAS file systems, see Billing of Extreme NAS file systems.

How can I view the expiration time of a storage plan?

You can view the basic information of the storage plan in the Storage Package section on the details page of the file system to which the storage plan is attached. The basic information includes the ID, capacity, start time, and expiration time of the storage plan.

Can I attach multiple storage plans to a file system?

No, you can attach only one storage plan to each file system. When you create a storage plan, you must attach it to a file system. Each storage plan can be attached to only one file system. If you require a storage plan of a higher specification or longer duration, you can upgrade or renew the storage plan. For more information, see Manage storage plans and Manage storage plans.

How can I check whether I have overdue payments?

You can check whether you have overdue payments in the User Center console. If you have overdue payments, you can no longer use your NAS file systems.

  1. Log on to the Alibaba Cloud Management Console.
  2. In the top navigation bar, click Expenses, and then go to the User Center console.
  3. In the left-side navigation pane, click Bill. On the page that appears, the overdue payments are displayed.
    If you have overdue payments, you can add funds to your account at your earliest opportunity.