OneDrive File Issues

Fix OneDrive Storage Full Due to Preservation Hold Library

Partner Editor Sep 28, 2026 870 views

Question details

The user's OneDrive is reporting full storage capacity, with the majority of the space being consumed by the Preservation Hold Library rather than standard user files.

How to Fix OneDrive Storage Full Due to Preservation Hold Library

Product: Microsoft OneDrive
Device & OS: not provided
Scenario: Checking OneDrive storage metrics after receiving a persistent storage full warning despite having few active files.
Observed behavior: Ordinary files use a small amount of space (e.g., 150 GB), but the Preservation Hold Library is consuming almost all available storage capacity, triggering a storage full error.

Before you start

Do not attempt to manually delete files from the Preservation Hold Library, as these are tied to organizational compliance and legal holds. You will need Microsoft 365 Administrator privileges to safely adjust these settings.

Solution 1Recommended

Review and Adjust Retention Policies via Microsoft 365 Admin Center

Identify and modify the retention policies or legal holds that are causing modified and deleted files to be endlessly stored in the Preservation Hold Library.

The Preservation Hold Library stores modified or deleted files to comply with organizational retention policies. When retention policies are overly broad or apply indefinitely, this hidden library can quickly consume all available OneDrive storage. Only a Microsoft 365 Administrator can alter these rules.

Log into Microsoft Purview

Have your IT administrator sign in to the Microsoft Purview compliance portal using their administrator credentials.

Locate Retention Policies

Navigate to 'Data lifecycle management' or 'Information governance' on the left sidebar and select 'Retention policies'.

Review Policy Settings

Identify which policies are applied to the affected OneDrive accounts. Check if the retention period is set to 'Forever' or if it applies to an unnecessarily broad scope of data.

Check eDiscovery Holds

Go to the 'eDiscovery' tab within the compliance portal to ensure the user’s OneDrive is not currently placed under a strict legal hold, which prevents any permanent file deletion.

Modify or Exclude Users

If organizational guidelines permit, edit the retention policy to exclude the specific OneDrive account, allowing the system to eventually clear out the Preservation Hold Library.

Review and Adjust Retention Policies via Microsoft 365 Admin Center

Compliance Warning: Never bypass or disable retention policies without explicit approval from your organization's legal or compliance department. Modifying these policies can result in the permanent loss of legally protected data.

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Frequently Asked Questions

What is the Preservation Hold Library in OneDrive?

The Preservation Hold Library is a hidden system folder in SharePoint and OneDrive. When an organization sets up retention policies or legal holds, any deleted or modified file is automatically saved here to ensure data is not permanently lost during the designated compliance period.

Can I manually delete files from the Preservation Hold Library?

No, standard users cannot manually delete files from this library. The files are protected by Microsoft 365 compliance settings. Only an administrator can remove or adjust the retention policy or legal hold, which then allows the system to automatically clear the files.

How long does it take to free up storage after a retention policy is removed?

Once an administrator removes a retention policy or legal hold, it can take up to 30 days for Microsoft 365 background processes to recognize the change and permanently purge the files from the Preservation Hold Library to free up your storage space.

How can I check my exact OneDrive storage metrics?

Click on the gear icon in your OneDrive online interface to open Settings, navigate to 'OneDrive settings', click 'More Settings', and select 'Storage Metrics'. This page will show you exactly how much space the Preservation Hold Library and other folders are consuming.

Document & File Issues