OneDrive storage quota suddenly changed to 10 GB in Microsoft 365 E5 Developer

takeshi ikeda 0 Reputation points
2026-09-12T08:00:21.5466667+00:00

I am using Microsoft 365 E5 Developer.

Until recently, my OneDrive worked normally and stored hundreds of GB of data.

However, my OneDrive now shows:

  • Storage quota: 10 GB
  • Usage: approximately 800 GB
  • Uploads are blocked
  • Folder creation is blocked
  • Sync is blocked

In Microsoft 365 Admin Center:

Users > [User] > OneDrive

the storage page says:

"This user's storage limit is 10 GB"

The tenant default OneDrive storage setting is configured to 1024 GB.

When I try to change the user quota, the Save button remains disabled.

Has anyone else experienced this issue recently?

Is this a change in Microsoft 365 E5 Developer storage policy, or is it a OneDrive site quota problem?

Any guidance would be appreciated.

Microsoft 365 and Office | Development | Microsoft 365 Developer Program
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  1. AI answer

    2026-09-12T08:00:36.0333333+00:00

    This behavior matches OneDrive quota enforcement, not a tenant default setting issue.

    When a user’s OneDrive usage exceeds the storage included with that user’s license, OneDrive automatically puts the site into read-only mode. In that state, uploads, folder creation, and sync are blocked. Users can typically only download or delete existing content. This can also happen if a user-specific quota was previously higher than the licensed entitlement and is later corrected.

    The supported checks and recovery steps are:

    1. Review the user’s effective OneDrive quota and usage. In the Microsoft 365 admin center, go to Users > Active users > select the user > OneDrive tab.
    2. If the license supports more storage, increase the user quota there. Path: Users > Active users > select the user > OneDrive tab > Storage used > Edit.
    3. If the quota value reverts or can’t be adjusted, run the OneDrive storage quota diagnostic in the Microsoft 365 admin center by selecting Run Tests and following the recommendations.
    4. If the user’s license does not support the required storage amount, the only supported resolutions are:
      • assign a license with higher OneDrive storage entitlement
      • reduce OneDrive usage below the effective quota
    5. When reducing usage, remember that version history, recycle bins, and Preservation Hold libraries count toward storage usage. After cleanup, empty the OneDrive recycle bin.
    6. After the quota is increased or usage is reduced, allow time for SharePoint Online to reevaluate the site, then verify uploads and edits work again.

    The context does not provide a Microsoft 365 E5 Developer-specific storage policy change. It does support that OneDrive storage is enforced according to the user’s licensed entitlement, and when the effective limit is lower than current usage, the site becomes read-only.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Roebe Ta 1,110 Reputation points Independent Advisor
    2026-09-12T09:59:50.2033333+00:00

    Hi @takeshi ikeda,

    Based on the current Microsoft 365 Developer Program FAQ, the documented OneDrive storage entitlement for Developer Program tenants is 10 GB per user for Developer SKU users' OneDrive storage.

    If your user's OneDrive quota has recently changed from 1024 GB to 10 GB, this may be the result of Microsoft enforcing the storage entitlement associated with the Developer Program license rather than an issue with the OneDrive site itself. Other users have recently reported the same behavior in Microsoft Q&A.

    For your reference: Microsoft 365 Developer Program FAQ | Microsoft Learn 

    User's image

    The symptoms you described are consistent with quota enforcement:

    • User quota shows 10 GB.
    • Actual usage exceeds the quota.
    • Uploads, folder creation, and sync are blocked.
    • The quota cannot be increased from the Admin Center.

    At this time, I have not found any Microsoft documentation indicating that Developer Program OneDrive quotas can be increased beyond the published entitlement.

    If you need official confirmation for your tenant, you may need to contact the Microsoft 365 Developer Program support team, as they can verify the licensing and backend configuration associated with your subscription.

    • For Unified/Premier, you may create a ticket online or contact support by signing in to Engage Center as Developer Support is available as an optional component of Microsoft Unified Support.

    For your reference: Open a new Support request - Microsoft Engage Center | Microsoft Learn

    (Please note that support through this channel may require an active support plan or a one-time support purchase. The advantage of opening a support case is that your inquiry will be routed directly to the Microsoft Product Group responsible for the affected service or feature. This provides access to specialists with direct knowledge of the product, making it the most appropriate avenue for investigating complex, tenant-specific, or undocumented scenarios.)

    I hope this helps clarify the situation.

    Best regards.

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