to Bleeping Computer.
Is it possible that you once did a Windows Backup to that local disk?
I had a similar issue with two of my backup drives, one internal and one external, after I upgraded to Windows 10 from Window 7 via a Clean Install. From what I could figure out by Googling, Windows Backup does create invisible shadow files. My solution was to move my backups off of the drives and reformat them and then move the backups back to the drives. Problem was solved.
Please let us know how you make out, and again, welcome to Bleeping Computer. Have a great day.