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SharePoint Document Issues

Can You Set a Maximum File Size in a SharePoint Document Library?

Huda QurayshiHuda Qurayshi Oct 22, 2026 868 views

Question details

The user wants to know if administrators can configure a maximum file size limit for documents uploaded to a specific SharePoint Online document library.

Can You Set a Maximum File Size in a SharePoint Document Library?
Product
SharePoint Online
Device & OS
not provided
Scenario
Managing storage and upload limitations for users within a specific SharePoint document library.
Observed behavior
Administrators need to restrict file upload sizes but need to confirm if SharePoint natively supports setting custom per-library maximum file sizes.
Before you start

Ensure you have site administrator privileges in SharePoint Online to view and manage overall storage limits at the site-collection level.

Solution 1Recommended

Understanding SharePoint File Size Limits and Managing Site Storage

While individual file size limits cannot be customized per library, administrators can manage overall storage limits at the site-collection level to control data usage.

SharePoint Online has a hardcoded maximum file upload limit of 250 GB for individual files in a document library. This specific individual-file limit cannot be reduced or customized by administrators for specific libraries.

However, to control overall storage usage across your organization, administrators can configure broader storage limits for the entire site collection using the SharePoint Admin Center.

1
Access the SharePoint Admin Center

Log in to your Microsoft 365 admin center using your administrator credentials, and navigate to the SharePoint admin center from the left-hand menu.

2
Navigate to Active Sites

In the left navigation pane of the SharePoint admin center, expand 'Sites' and then click on 'Active sites'.

3
Select the Target Site

Locate and click on the specific site collection where you want to manage storage limits.

4
Edit the Storage Limit

In the site details panel, click on the 'Storage' tab and select 'Edit' to assign a maximum storage quota for the entire site collection.

Understanding SharePoint File Size Limits and Managing Site Storage
Attachment Limits: Remember that while document libraries support up to 250 GB per uploaded file, files attached directly to list items are strictly limited to 250 MB.
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Frequently Asked Questions

Can I increase the 250 GB file size limit in SharePoint Online?

No, the 250 GB maximum file upload limit in SharePoint Online is a hardcoded limitation set by Microsoft and cannot be increased by administrators.

What is the maximum file size for list-item attachments in SharePoint?

Files attached directly to list items in SharePoint Online are restricted to a maximum size of 250 MB per file.

How do I restrict users from uploading large files to a specific SharePoint library?

While you cannot set a custom file size limit per library natively, you can restrict the overall storage quota for the entire site collection or use Power Automate flows to alert on or delete files exceeding a certain size.