Wish once a time disks can support to add user-defined filetype context menus. For example,I hope that disk like C could be right click with the show of 'Go folder content path' just like what normal folders do.
The context menus for drive roots can be edited, but only to the same extent as in File Explorer and so on. This is because we don't show custom menus for the drive roots (unlike most other folders); we just ask Windows to show the standard menu. (At least, that's how it works currently.)
So you can add things to them, but not Opus-specific things like the dynamic menus which go foldercontent generates.
Most operations don't work on drive roots, which I think is why we did not apply the more general custom context menus to them.