Troubleshooting File History
If you see error messages that don’t provide enough detail for you to figure out what went wrong, or if you notice that files you expect to be backed up aren’t getting backed up, you can view detailed logs from the Windows Event Viewer.
Viewing File History Event History
You can view details of all File History events in the Windows Event Viewer.
From the Advanced Settings screen in File History, tap the Open File History Event Logs link.
If prompted, enter your password for User Account Control.
Select an event to see more details about it.