Many thanks for the reply.   Windows is the Host.   Having set up the shared folder using Virtualbox's Shared Folder menu I was trying to link the Kubuntu (Guest) Desktop Folder to the one on my Windows desktop following an article I found   https://www.geeksforgeeks.org/create-shared-folder-host-os-guest-os-virtual-box/    

Which is the host, Linux or Windows? Why are you using the command line instead of the Vbox sharing? /Devices/Shared folder?

Yeah my bad. Guess I am just a tad grumpy at the moment and venting at big corp. I knew abut xda it is a neat site. 🤓

Greetings to all,                           I'm trying to add a Virtualbox shared folder between Wndows 11 and Kubuntu 23.10. The final command was $ sudo mount -t vboxsf Scotts_LinuxS_Shared ~/Desktop/windowsshare   But when I try to save a file into the windowsshared folder in Kubuntu I receive the followng error   Can anyone please advise where I am going wrong.?   Many thanks for reading this far. Scott

I do not do it anymore but I can root my phone and install one of a ton of customer ROM builds.  https://xdaforums.com/  is the defacto site for builds and instructions for most any phone out there.