I wonder if you have some sort of Image Backup software like Macrium Reflect, which enables you to mount that Backup Image as a drive, to enable it to be explored and copied from/to like a normal drive.
I've just mounted my Image Backup as Drive L, and it comes up the same as yours ... "Local Disk", although it doesn't show up as "Raw".

The possibility is that it was mounted, but wasn't later "detached" when finished with.
A long shot, but worth a mention.