Troubleshoot OneDrive Error This File Can't Be Synced

Encountering the error message “This file can’t be synced” in OneDrive can be frustrating, especially when you’re trying to access or share crucial documents. This article provides a comprehensive list of troubleshooting steps tailored for Windows and Mac users, IT professionals, and anyone facing persistent OneDrive sync issues. Whether you’re a casual user or managing a business environment, these steps will help you identify and resolve common causes of sync failures, ensuring your files stay up-to-date and accessible.

1. Check Your Internet Connection

OneDrive relies heavily on a stable internet connection to sync files properly. If your connection is slow, intermittent, or disconnected, files may fail to upload or download, triggering the error. Ensure you’re connected to a reliable Wi-Fi or Ethernet network; try browsing the web or streaming a video to verify internet stability before reattempting sync.

2. Verify File Size and Name Restrictions

OneDrive has specific limits for file size and filename characters. Files larger than 100GB (with the latest updates) or files with invalid characters like * ? < > : | ” are blocked from syncing. Check your file’s size and rename any files with unsupported characters or excessive length to resolve the issue.

3. Pause and Resume Syncing

Sometimes, a simple pause and resume of sync can clear temporary glitches. Right-click the OneDrive icon in the system tray or menu bar, select ‘Pause syncing,’ wait a few minutes, then click ‘Resume syncing.’ This refreshes the connection and often resolves minor sync errors.

4. Clear OneDrive Cache

Corrupted cache files can interfere with the sync process. On Windows, close OneDrive, then navigate to %localappdata%
Microsoft\OneDrive\cache and delete the contents. On Mac, go to ~/Library/Application Support/OneDrive/ and delete the cache folder. Restart OneDrive afterward to see if the issue persists.

5. Check for File or Folder Permissions

If you lack permissions for certain files or folders, OneDrive may prevent syncing. Right-click the problematic files, select ‘Properties,’ then review the security settings. Ensure your user account has full control or edit permissions to allow sync operations to complete successfully.

6. Update or Reinstall OneDrive

Outdated or corrupted app versions can cause sync errors. Download the latest OneDrive installer from Microsoft’s official website and install it over your current version. If issues persist, uninstall OneDrive completely, then reinstall to reset all settings and files.

7. Resolve Conflicting Files

Conflicts occur when multiple devices change a file simultaneously or when files are renamed or moved outside of OneDrive. Check for duplicate or conflict copies labeled with the date or ‘conflicted’ in their name, and resolve these issues by choosing the correct version or merging changes.

8. Check Storage Limits

If your OneDrive storage is full, new files won’t sync. Log into your OneDrive account online and verify your storage usage. Delete unnecessary files or upgrade your plan to free space and restore syncing capabilities.

9. Disable Antivirus or Firewall Temporarily

Overly aggressive security software can block OneDrive from communicating with Microsoft servers. Temporarily disable antivirus or firewall programs, then attempt to sync again. If this resolves the issue, add OneDrive as an exception in your security settings.

10. Review Windows or Mac System Updates

Outdated operating systems can interfere with app performance. Ensure your Windows or Mac OS is updated to the latest version. System updates often include bug fixes and compatibility improvements that can resolve sync errors.

How to Choose

When selecting the best troubleshooting step, consider the specific nature of your problem. Is your internet connection stable? Are there large or unsupported files involved? Is the issue isolated to certain folders or files? Prioritize steps that address the root cause—such as checking storage limits if your space is full, or updating OneDrive if you’re running an outdated version. Also, consider your technical comfort level; some steps like clearing cache or reinstalling software might require more technical knowledge. Always back up important files before making significant changes.

Frequently Asked Questions

Why does OneDrive say “This file can’t be synced” even though the file is small?
It could be due to filename restrictions, permissions issues, or corrupted cache files. Double-check the filename and permissions, and try clearing the cache.
Can I recover files that failed to sync?
Yes, if they are saved locally, you can manually move or rename them. Files that never synced might be stored in your local OneDrive folder but not uploaded to the cloud.
Does restarting my computer fix sync errors?
Often, a simple restart resets temporary issues and refreshes network connections, resolving minor sync problems.

How do I know if my OneDrive storage is full?
Log into your OneDrive account online, check the storage bar, or right-click the OneDrive icon and select ‘Settings’ > ‘Account’ to view storage details.
Is it safe to reinstall OneDrive?
Yes, reinstalling resets app settings and clears potential corruption, often fixing persistent sync errors without risking data loss.

Final Thoughts

Dealing with OneDrive sync errors can be straightforward once you understand the common causes and remedies. Start with simple checks like internet connectivity and file restrictions, then move on to more technical solutions such as cache clearing and software updates. Always ensure your system and apps are up to date, and maintain good file management practices to prevent conflicts. If problems persist, consulting Microsoft’s support or community forums can offer additional guidance tailored to your specific setup. With patience and methodical troubleshooting, you’ll restore seamless synchronization and keep your files accessible across all devices.

Troubleshoot OneDrive Error This File Can’t Be Synced