I am sorry, I confused DLNA with SMB.
What I mean is that I used to be able to to access
the shared data on the microsd card inserted into
the hotspot device via Finder-> Network feature
to access all of the files being shared on the microsd
under MacOS.

As I said, I have no issues under Windows (also on the same
Mac under Bootcamp) when I boot into that partition .
Kodi software on the Mac can access
the data shared on the inserted microsd card via UPNP, browse
folders link. VLC can too. But MacOS Finder -Network requests
a username and password. I tried admin and root as usernames
and those do not work. I am sure I am typing the correct password
which is the same as when I access the Slate ATX1800 using
a browser via its IP address. I have success there as I have made
modifications, updates to the device easily even going to the
Applications → Network Storage section to enable DLNA, Samba
and other things to make sure the microsd card data is being
shared properly (and it is via Kodi, Windows, etc.).

I think there is a trick with the MacOS Finder->Network way and
I forgot how I did it. However I believe I had not upgraded
to Monterey at that time… I was using MacOS Mojave when I had
success accessing the shared microsd card in the device.