A recent Windows update is causing problems with File History.
Some have reported uninstalling 2026-09 Security Update (KB5124008) works as a temporary solution.
File History No Longer Recognizes External Drive
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Alvaro Bracamonte
0
Reputation points
I all of a sudden cannot save File History to my external drive. Backup works fine but File History will not recognize the drive. Please advise.
Windows for home | Windows 10 | Recovery and backup
3 answers
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John Jefferson Doyon 89,175 Reputation points Independent Advisor2026-10-01T19:29:05.69+00:00 Have you already tried reselecting the external drive in File History?
Open "Control Panel" > "System and Security" > "File History" > "Select drive", then select the external drive again. Microsoft recommends reselecting the drive when File History stops recognizing a previously connected backup drive.
If the issue still persists, to help narrow down the issue:
- Does the external drive appear normally in File Explorer, and can you open and save files to it?
- What exact message does File History show when you try to select the drive?
- Press Windows key + R, type winver and press Enter. What Windows 10 version and OS build are shown?
Click "Add comment" to let me know.
Thanks!
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AI answer
2026-10-01T18:43:13.1833333+00:00 Try these steps in order:
- If File History uses a USB or other external drive, make sure the drive is physically connected to the PC.
- Open Control Panel > System and Security > File History.
- If the drive is no longer selected correctly, choose Select drive and reselect the external drive.
- If File History is set to a network location instead, in Control Panel > System and Security > File History, reselect the network location.
- After reconnecting or reselecting the drive, wait for the next scheduled backup.
- To test immediately, in Control Panel > System and Security > File History, select Run now.
If File History still does not recognize the drive, File History can be configured again from Control Panel > System and Security > Save backup copies of your files with File History. If no drive is selected by default, use Select drive, choose the external drive, and select OK.
File History backs up libraries such as Documents, Pictures, Videos, and Desktop. Other folders can be added by right-clicking the folder and selecting Show more options > Include in library.
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