Fix Box files opening as read-only in File Explorer

Introduction

If your Box files are opening as read-only in File Explorer, it usually means something is preventing Box Drive from syncing, unlocking, or passing the file through for editing. This guide covers the most common causes and the steps you can take to get back to normal access.

Issue description

A file may open in read-only mode when Box cannot confirm that the file is available for editing, when another user is actively editing it, or when a local system setting or security tool is interfering with Box Drive.

Signs

• The file opens, but you cannot save changes
• File Explorer shows the file as read-only
• Box Drive does not appear to sync the latest version
• You see a lock, sync, or access-related warning

Basic troubleshooting steps

1. Clear your browser cache and cookies.
2. Restart Box Drive.
3. Confirm that you have permission to unlock and edit the file.
4. Check whether another user is currently editing the file.
5. Review your antivirus and firewall settings for possible interference.

Advanced troubleshooting steps

Step 1: Clear browser data

Clear the cache and cookies in the browser you use with Box, then sign in again. This can help remove stale session data that may be affecting file access.

Step 2: Restart Box Drive

Quit Box Drive completely, then reopen it. If needed, restart your computer to refresh the sync connection and file status.

Step 3: Verify file permissions

Make sure your account has the necessary permissions to edit or unlock the file. If you do not have access, contact your Box admin or file owner.

Step 4: Check sync and file status

Look for sync errors, duplicate files, or signs that the file is open elsewhere. If another user has the file open, wait until they finish editing before trying again.

Step 5: Review security software

Temporarily review antivirus or firewall settings to see whether they are blocking Box Drive. If needed, work with your IT team to allow Box traffic and file access.

Contact support

If the file still opens as read-only after these steps, contact your Box administrator, IT support team, or Box Support for further help. Include the file name, the device you are using, and any error messages you see.

Additional resources

You may also want to review your organization’s Box access policies, sync settings, and security software documentation for more information about file editing and permissions.

Conclusion

Read-only file behavior in File Explorer is usually caused by permissions, sync issues, or software interference. Working through the steps above should help you identify the cause and restore normal editing access.