OneDrive File Issues

Fix OneDrive Low Disk Space Error With Folder Junctions

Ayan Masood Oct 16, 2026 868 views

Question details

Users need a way to bypass OneDrive's incorrect storage calculations when syncing files linked via folder junctions.

How to Fix OneDrive Low Disk Space Errors Caused by Folder Junctions

Product: Microsoft OneDrive
Device & OS: Windows
Scenario: Distributing large sync files across multiple local hard drives using folder junctions within the primary OneDrive directory.
Observed behavior: OneDrive miscalculates required storage space based on the folder junctions, falsely reports low disk space, and blocks synchronization.

Before you start

Pause OneDrive synchronization and manually back up your linked files to an external drive to prevent OneDrive from accidentally interpreting junction changes as file deletions.

Solution 1Recommended

Temporarily Move Folder Junctions to Bypass Space Validation

Relocating your folder junctions temporarily allows OneDrive to pass its initial sign-in and space validation checks without triggering the error.

OneDrive often evaluates the linked targets of folder junctions as if they reside on the primary drive. By removing them from the OneDrive folder temporarily, the client can boot and validate the actual disk space accurately.

Pause OneDrive Syncing

Click the OneDrive cloud icon in your system tray, select the Gear icon (Help & Settings), and choose 'Pause syncing' to halt all background activity.

Relocate the Junctions

Open Windows File Explorer, navigate to your OneDrive directory, and move the specific folder junctions to your Desktop or another temporary local folder.

Resume Syncing and Validate

Return to the OneDrive menu and resume syncing. Allow the application to start up completely and clear the low disk space error.

Restore the Junctions

Once the error is cleared and OneDrive is running normally, carefully move the folder junctions back into your OneDrive directory.

Temporarily Move Folder Junctions to Bypass Space Validation

Risk of Cloud Deletion: Never delete or move folder junctions while OneDrive is actively synchronizing, as the client may interpret the missing link as a command to delete the corresponding files from your cloud storage.

Solution 2

Verify Junction Compatibility with Microsoft Support

Confirm with Microsoft whether your specific OneDrive client version fully supports folder junctions to prevent recurring sync loops.

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Frequently Asked Questions

Why does OneDrive report low disk space when I use folder junctions?

OneDrive scans the linked targets of folder junctions as if they were standard folders physically located on your primary drive. This causes it to double-count file sizes or incorrectly read the available free space on the C: drive.

Will deleting a folder junction in OneDrive delete my original files?

If OneDrive is actively syncing when you delete the junction, it may interpret the action as a user deletion and automatically remove the files from your cloud storage. Always pause syncing before making changes to junctions.

Can I use symbolic links instead of folder junctions for OneDrive?

OneDrive's support for both symbolic links and folder junctions is inconsistent. While symbolic links might occasionally work, they often trigger the same storage miscalculations, sync loops, or file duplication issues during client updates.

Document & File Issues