Hi Mark Lovell,
Welcome to Microsoft Q&A forum. I'm happy to help.
Please try refreshing File History by following steps:
- Turn off File History.
- Delete the File History database:
- Press Windows key + R.
- Type
%UserProfile%\AppData\Local\Microsoft\Windows\FileHistoryand press Enter. - Select all files in the folder and delete them.
- Re-enable File History.
- Test it again.
Alternative, you may run cleanup command instead of using GUI. Please run this command on Command Prompt:
fhmanagew.exe -cleanup <days>
Please replace <days> with an integer, example: 30, 60, 180.
Please note that File History tends to skip very deep folder structures, as at the moment File History may not support Long Paths.
I hope that above information is helpful to you.
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