- Free allowance
- 1 GB on registration and 20 GB after identity verification: '注册赠送1G存储。需要20G和S3、WebDAV、MCP需要使用国家网络身份认证app进行认证'
- Verdict
- fails: quotathe free allowance is too small to matter
- Cost
- free tier
- Identity
- national-idno card, no phone
- Binding limit
- write-gated20 GB and the S3, WebDAV and MCP interfaces all require the 国家网络身份认证 app
- Evidence
- reported3 sources; a third party said so
- Freshness
- stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05
| Free tier | 1 GB on registration and 20 GB after identity verification: '注册赠送1G存储。需要20G和S3、WebDAV、MCP需要使用国家网络身份认证app进行认证' unit GiB; metered on stored-bytes |
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| Price | none stated |
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| Limits | - write-gated (binding) 20 GB and the S3, WebDAV and MCP interfaces all require the 国家网络身份认证 app source
- per-object-cap 20 GB is the account total and the per-object cap is unstated source
|
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| Binding | write-gated Unlimited traffic and no request metering, and the gate is a national identity app. Only 1 GB is available without verification, so the identity decision is the only one that matters. |
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| Identity | national-id the 国家网络身份认证 app, a national digital identity. Registration alone yields 1 GB with no identity document |
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| Egress | not published free allowance: unlimited |
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| Per-object cap | Not published |
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| Retention | Not published. State-backed academic infrastructure, so durability is high and shutdown risk low |
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| Interface | s3, webdav |
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| Tooling | first-party S3 credentials with an AccessKey from 客户端访问, plus WebDAV and MCP. A rclone S3 mounting walkthrough exists and sccache over CSTCloud is documented for Rust builds |
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| Composes with | 20 GB per verified identity and each data space is a separate bucket, so the only multiplier is identities. The identity is 国家网络身份认证, a national digital ID app, which makes it non-multiplicable for a user |
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| Reliability | State-backed academic infrastructure, so durability is high. But a non-Chinese client cannot pass the national identity check, which caps them at 1 GB. The service is CSTCloud's, and the two are related but not the same institution, so both spellings are in the aliases |
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| Notes | Unlimited traffic with S3, WebDAV and MCP access, behind a national digital identity. storage/cstcloud holds the same provider for its object-storage role. |
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| Parsed numbers | - has-free-tier 1
- write-gated 20 GB
- per-object-cap 20 GB
|
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