Windows VirtualBox guest Shared Folders
If a VirtualBox virtual machine can’t see Shared Folders in your Windows guest with Linux host, fix by:
In Linux Terminal:
adduser $(whoami) vboxusers
In Virtualbox Windows guest, click Install Guest Additions
in the VirtualBox menu
Run setup
on the virtual drive that appears.
Reboot the Windows guest.
From Windows guest Command Prompt:
net use x: \\vboxsvr\share
where “share” is the name assigned in the VirtualBox shared folders dialog.