It may not be completely up to date an accurate. I wrote it back when I was a Windows user (on XP IIRC) but have since moved to Linux on my desktop so I haven't been able to update it.
IIRC I ended up using WinSSHFS to access remote Linux filesystems anyway (instead of VBox shared folders). My theory is that it made more sense to modify my desktop to work with any/all TurnKey VMs OOTB (where ever they're running), than to have to manually configure every new TKL VM I launched! FWIW there is a link to the project on GitHub on this doc page if you want to go that path?
This doc is pretty old...
IIRC I ended up using WinSSHFS to access remote Linux filesystems anyway (instead of VBox shared folders). My theory is that it made more sense to modify my desktop to work with any/all TurnKey VMs OOTB (where ever they're running), than to have to manually configure every new TKL VM I launched! FWIW there is a link to the project on GitHub on this doc page if you want to go that path?