SharePoint Online site collections (25 TB per site ceiling)
learn.microsoft.com/en-us/sharepoint/sharepoint-limitsCloud drivestorage/sharepoint-online-site-collectionsJSONcomparereport an errorprovider JSON
- Free allowance
- 25 TB maximum storage per site collection; 2,000,000 site collections per organization; 500,000 site collections per education tenant; file upload limit 250 GB.
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tier
- Identity
- email?placeholder, not evidence; card unknown, phone unknown
- Binding limit
- noneno named constraint binds
- 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 | 25 TB maximum storage per site collection; 2,000,000 site collections per organization; 500,000 site collections per education tenant; file upload limit 250 GB. unit objects; metered on stored-bytes |
|---|---|
| Price | none stated |
| Identity | email (placeholder) not published |
| Egress | Unmetered (same M365 subscription model - no per-GB egress meter). |
| Per-object cap | not stated |
| Retention | not stated |
| Interface | rest, graph, rclone rest |
| Tooling | Microsoft Graph (Sites.ReadWrite.All, Files.ReadWrite.All, app-only client-credentials flow); rclone 'onedrive' remote with drive_type=documentLibrary and a site/drive_id, or the SharePoint v2.0 endpoint override via tenant_url |
| Composes with | This is the structural ceiling inside the A1 tenant: the pool is 100 TB, a single library can address 25 TB, and there are up to 2M sites. In a paid E3/E5 tenant (1 TB + 10 GB/license) the same 25 TB-per-site ceiling applies, so a 100-license tenant has 2 TB pooled but 50 sites worth of address space. Per-site ceilings only bind once you have the pool to back them. |
| Reliability | Version bloat is the real data-loss-adjacent hazard: re-uploading a 20 GB file to a Team site library can consume hundreds of GB of pool in hidden versions. |
Evidence 3
| date | source | what it proved |
|---|---|---|
| 2026-10-21 | learn.microsoft.com/en-us/sharepoint/sharepoint-limits | 'Max storage per site (site collection) 25 TB'; 'Sites (site collection) per organization 2 million'; '250 GB - File upload limit'; 'Versions 50,000 major versions and 511 minor versions' |
| 2026-10-21 | learn.microsoft.com/en-us/office365/servicedescriptions/offi | 'Storage for site collections: Up to 25 TB per site collection or group'; 'Site collections per tenant: 500,000' |
| 2026-10-21 | michifumi.de/blog/2026-09-21-bypass-e5-onedrive-10gb-limit-m | documents team-site vs communication-site versioning bloat and dual-mount rclone setup against a 300 GB E5 tenant |
Unknown values 5
$.binding_noteboilerplate$.per_object_cap.notesthe field may be stated in a source that was not read$.per_object_cap.statedthe field may be stated in a source that was not read$.retention.notesthe field may be stated in a source that was not read$.retention.statedthe field may be stated in a source that was not read