ENS charges for three storage services: cloud disks, Edge Network Storage (EOS), and Network Attached Storage (NAS). This page covers the pricing and billing rules for each.
Cloud disk
Billing starts as soon as a cloud disk is created and is based on its capacity.
Pricing
Billing item (CNY/GB) | Daily unit price | Monthly unit price |
All-flash disk | 0.0667 | 1 |
Ultra Disk | 0.0233 | 0.35 |
SSD local disk | 0.0233 | 0.35 |
HDD local disk | 0.00267 | 0.04 |
Billing method by creation path
How a cloud disk is billed depends on how it was created:
Created with an ENS instance: the billing method and lifecycle match those of the ENS instance. Both subscription and pay-as-you-go are available.
Created separately: pay-as-you-go only.
Subscription
Pay upfront for the cloud disk together with the ENS instance.
Fee formula: Cloud disk capacity x monthly unit price x subscription duration (months)
Annual discount: monthly price x 12 x 0.85
Pay-as-you-go: daily peak billing
| Item | Details |
|---|---|
| Billing rule | Charge based on the daily peak cloud disk capacity. The system samples capacity every 5 minutes, producing 288 readings per day. The highest reading becomes the billing value for that day. |
| Billing cycle | Daily. The bill for the previous day is generated and charged at 00:00 (UTC+8). Exact timing depends on the system. |
| Fee formula | Sum of (daily peak capacity x daily unit price) for each disk type in use that day. |
Example: You have one Ultra Disk with a daily peak of 500 GB. The daily charge is 500 GB x $0.003239/GB = $1.62.
Pay-as-you-go: monthly peak billing
| Item | Details |
|---|---|
| Billing rule | Charge based on the monthly peak cloud disk capacity. The system samples capacity every 5 minutes (288 readings/day). The highest daily reading in the month becomes the monthly billing value. |
| Billing cycle | Calendar month. The bill is generated and charged on the 1st day of the following month. Exact timing depends on the system. |
| Fee formula | Sum of (monthly peak capacity x monthly unit price x effective factor) for each disk type in use that month. |
Effective factor accounts for disks that are not provisioned for the full month:
Effective factor = effective days / total days in the month Effective days = the number of days from disk creation to release within the month. If the disk is not released during the month, count from creation to month-end.
Examples:
| Scenario | Effective days | Effective factor (June 2024, 30 days) |
|---|---|---|
| Created June 5, released June 25 | 21 | 21 / 30 = 0.70 |
| Created June 5, kept through month-end | 26 | 26 / 30 = 0.86666667 |
End-to-end example: An Ultra Disk reaches a monthly peak of 1,000 GB. It was created on June 5 and kept through month-end (26 effective days).
Fee = 1,000 GB x $0.0493/GB x (26 / 30) = $42.73
Snapshot
| Billable item | Fee formula | Billing method |
|---|---|---|
| Snapshot size | Snapshot unit price x snapshot size (GB) x billing duration (months). The unit price equals that of the corresponding cloud disk type (Ultra Disk: $0.0493/GB/month; All-flash disk: $0.1408/GB/month). Billing starts when the snapshot is created and stops when it is deleted. Partial months are prorated: a snapshot retained for 21 days is billed as 21 / 30 = 0.7 months. | Pay-as-you-go (post-paid). Bills are generated monthly. |
| Cross-edge-zone snapshot replication traffic | Unit price x snapshot size (GB) x 2 (traffic is generated in both the source and destination edge zones). Unit price: $0.05/GB. The first replication of a cloud disk snapshot between edge zones copies the full snapshot. Subsequent replications between the same edge zones are incremental. | Pay-as-you-go (post-paid). Bills are generated monthly. |
Edge Network Storage (EOS)
EOS uses pay-as-you-go billing based on actual usage. For more information about EOS, see Overview of Edge Network Storage (EOS).
| Item | Price |
|---|---|
| Storage capacity (Chinese mainland) | $0.00001956/GB/hour |
| Storage capacity (outside Chinese mainland) | $0.0000225/GB/hour |
| Outbound traffic over Internet | $0.05/GB |
| PUT requests | CNY 0.067/10,000 requests |
| GET requests | CNY 0.067/10,000 requests |
| Billable PUT requests | PUT request count − Storage capacity × Deduction coefficient × PUT request count / (PUT request count + GET request count) (minimum value is 0) |
| Billable GET requests | GET request count − Storage capacity × Deduction coefficient × GET request count / (PUT request count + GET request count) (minimum value is 0) |
Where:
- PUT request count: total number of PUT-type requests within one billing cycle (1 hour)
- GET request count: total number of GET-type requests within one billing cycle (1 hour)
- Storage capacity: peak storage capacity (GB) within the billing cycle (1 hour)
- Deduction coefficient: number of free requests per GB of storage capacity per hour (20)
Billing cycle: hourly. Charges are deducted in real time after each cycle ends. Exact timing depends on the system.
Example: An ENS customer on the Chinese mainland stores a peak of 20,000 GB between 13:00 and 14:00. During this hour, they issue 800,000 PUT-type requests and 200,000 GET-type requests.
Billable PUT requests = 800,000 − 20,000 × 20 × 800,000 / (800,000 + 200,000) = 480,000
PUT request fee = 0.067 × 480,000 / 10,000 = CNY 3.216
Billable GET requests = 200,000 − 20,000 × 20 × 200,000 / (800,000 + 200,000) = 120,000
GET request fee = 0.067 × 120,000 / 10,000 = CNY 0.804
Request fees take effect starting August 17, 2026.
PUT-type requests include operations of the DELETE, POST, and PUT methods.
GET-type requests include operations of the HEAD, GET, and OPTIONS methods.
Only requests that return 2xx or 3xx status codes are billable. Requests that return 4xx or 5xx status codes are not charged.
Network Attached Storage (NAS)
NAS uses pay-as-you-go billing based on actual hourly resource usage. For more information about NAS, see Overview of Network Attached Storage (NAS).
Fee formula: Actual resource usage x hourly unit price
| NAS type | Hourly unit price |
|---|---|
| Storage-optimized | $0.00006847/GB/hour |
| Performance-optimized | $0.00019562/GB/hour |
Billing cycle: hourly. Charges are deducted in real time after each cycle ends. Exact timing depends on the system.