OneDrive File Issues

How to Fix OneDrive Files Using Hard Drive Space Despite Files On-Demand

Nimra Malik Sep 25, 2026 869 views

Question details

The user is experiencing an issue where OneDrive and SharePoint files are consuming physical local storage space even though the Files On-Demand feature is enabled.

How to Fix OneDrive Files Using Hard Drive Space Despite Files On-Demand

Product: Microsoft OneDrive
Device & OS: not provided
Scenario: Setting up or synchronizing large SharePoint libraries with the OneDrive desktop client.
Observed behavior: Files are downloaded to the local hard drive and consume storage space instead of remaining in an online-only state as expected.

Before you start

Ensure you have a stable internet connection and that your OneDrive desktop client is updated to the latest version before troubleshooting sync and storage issues.

Solution 1Recommended

Verify OneDrive Sync Limits and File Count

Check if your synchronized SharePoint libraries exceed OneDrive's performance limits, which can cause metadata and caching to consume local storage.

Although Files On-Demand is designed to save space, syncing massive SharePoint libraries can still use local storage because OneDrive needs to download metadata and cache file structures. If you are syncing more than 300,000 files across all your libraries, the sync engine may struggle, leading to unexpected local space consumption.

Check Library File Count

Log in to your SharePoint online portal, navigate to your document libraries, and check the total file count. Ensure the combined total across all synced libraries is well below 300,000 files.

Review Connected Accounts

Click the OneDrive cloud icon in your system tray, click the Gear icon, and select 'Settings'. Navigate to the 'Account' tab to review all currently synced locations.

Stop Syncing Excess Libraries

Click 'Stop sync' next to any massive or infrequently used SharePoint libraries. This will remove the local connection and stop the metadata from consuming hard drive space.

Verify OneDrive Sync Limits and File Count

Performance Thresholds: Microsoft recommends keeping the total number of synced files across all document libraries under 300,000 to maintain optimal performance and prevent storage bloat.

Solution 2

Re-enable Files On-Demand and Force Free Up Space

Manually clear locally cached files by confirming your Files On-Demand settings and using the Free up space command.

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Frequently Asked Questions

Does the Files On-Demand feature consume storage during the initial setup?

Yes, during the initial sync and setup, OneDrive must cache folder structures, metadata, and file thumbnails. For very large SharePoint libraries, this cached data can temporarily or permanently consume noticeable local hard drive space.

What happens if I sync more than 300,000 files in OneDrive?

Syncing over 300,000 files across all libraries can cause severe performance degradation and unexpected local storage consumption. The OneDrive sync engine struggles to process the metadata for that many files, even if Files On-Demand is enabled.

How do I know if a OneDrive file is taking up local space?

Open File Explorer and check the status column next to your files. A solid green circle with a white checkmark indicates the file is physically stored on your device. A blue cloud icon means it is online-only and taking up zero bytes of local storage.

Document & File Issues