net use Z: \\vboxsvr\vb-share; System error 53 network path not found

[luigiwriter2]

Summary: Errors received

net use Z: \\vboxsvr\vb-share
   System error 53 has occured
   The network path was not found.

and
Map drive:

\\vboxsvr\vb-share
    "Windows can't find a computer or device named 'vboxsvr'"
    Error code 0x80070035
    The network path was not found.

What I have done:
virtualbox.org/virtualbox/6.1.16/Oracle_VM_VirtualBox_Extension_Pack-6.1.16.vbox-extpack
Installed
Member of both vboxsf and vboxusers
Win10-Home Guest: Created and Windows 10 Home installed
Used File->Close->Power off .
Ubuntu 18.04 Host Terminal
\home\luigiwriter\vb-share share file created

VBoxManage sharedfolder add "Win10-Home" --name "vb-share" --hostpath "/home/luigiwriter"
VBoxManage: error: Shared folder named 'vb-share' already exists

Well, at least VBoxManage knows it exists, but not able to tell Windows 10???
Win10-Home Guest:

net use Z: \\vboxsvr\vb-share
   System error 53 has occured
   The network path was not found.

Windows file manager:
* network lists local machine, but not \\vboxsvr
* Map drives does not find it either.

Hard Reboot just to be sure
Windows file manager:
Map drive:

\\vboxsvr\vb-share
    "Windows can't find a computer or device named 'vboxsvr'"
    Error code 0x80070035
    The network path was not found.

Have to type everything in because the clipboard is not working either although set to bi-directional.

4 days at this. searched google, Oracle, Virturalbox.org, and too many more to discover that no one with this combination has this exact problem.
Or if they did and did what I did above, and it worked for them but usually on older Ubuntu and older Window combinations.
At wits end,

Hope someone can see what I have missed while been staring at this for days

[TheFu]

Guest additions installed?
I suspect "vboxsvr" is a placeholder. Put the real hostname there and try again.

Lastly, google "virtualbox manual" to find the manual for how to do this.
https://www.virtualbox.org/manual/ch...#sharedfolders Appears you've found that.

I've never used linux as the hostOS with vbox. Sorry. I can say that KVM-qemu flies with Windows as a guest when the spice protocol is used.

[Tadaen_Sylvermane]

I don't fully understand what you are doing as I prefer KVM. Maybe just switch the network to bridged mode inside Virtualbox then create a regular samba share and map it like that? Then for all purposes it's just another machine on the lan and you can work with it as such.