Hi Guylesire.
This particular file may not be a file as such but a shortcut to an address in the registry where the details for the transfer of files are kept, a more secure way of keeping tabs on what is sent and received.
In this case it is not possible to copy and paste it as it is only a shortcut if you like.
I've uninstalled onedrive since they are reducing the storage capacity so I can't test my theory, but something in the back of my mind from windows 98 did the same thing when trying to copy/paste a reg directory.
The file if I remember has a HAT prefix which is not shown, not sure where I saw this now, but that reminds me of a secure file that doesnt like to be copied as well.