Just an FYI. In Win 10 I had the same issue with some m4b files and found that they were being synced to OneDrive (Don't remember setting that up). You can tell by the status column in Explorer.
Just an FYI. In Win 10 I had the same issue with some m4b files and found that they were being synced to OneDrive (Don't remember setting that up). You can tell by the status column in Explorer.