So what is the default username when it prompts for it?
is it admin , is it root? There is no specific username when
one accesses the hotspot via its IP address.
Again, Kodi can access the shared data on the microsd card
and Windows has no problems accessing it as well.
The only problem is MacOS. I used to be able to do this
on Mac and I am not sure what happened.
VLC also asks for username and password (assuming it is
the password of the device when accessing it via its IP address
in a browser).
Something has changed under MacOS.