DJ

There is an InPrivate mode, unfortauntely same issue as normal mode on Edge. Though at least others browsers work fine. :)

Confirmed, working fine using Firefox and Chrome it appears to upload fine... though it bugs me that my Edge doesn't and yours does. ;) Cheers.

Also using Edge. When selecting the file, I am clicking to browse and just selecting the file as I don't have the option to type it. The slashes are just being entered automatically from the path, as of course Windows doesn't support slashes in file names. Very odd indeed. :/ Strange that you don't get it the two machines I setup do. Suggests something is different on my machines, but the only thing that I can imagine that would be different from a just out of the box machine is proxy settings, which...

File Manager using UNC path as filename