On Fri, 10 Jul 2020 at 11:40, D. Hugh Redelmeier via talk <talk@gtalug.org> wrote:

We have an old IOmega Home Media Server, Cloud Edition NAS.

It's just a single external 3.5" HDD with a little ARM board to turn it
into a NAS. This is so old that the company has changed a few times:
EMC bought IOmega
Dell bought EMC
Lenovo bought (parts of?) EMC from Dell
Perhaps I've missed some steps.

Since I updated our desktops Fedora 31, Nautilus (AKA "Files") on the
Gnome desktop could not see it.

To fix this took a bit of discovery. Eventually I added a line to
/etc/samba/smb.conf. In the [global] section:

client min protocol = NT1

This isn't a great thing from a security standpoint but it's no worse
than before the Fedora update.

This is surely obvious to any experienced Samba user, but I'm not one.
My only use of Samba is to access our NASes throuh Nautilus.

Setting "client min protocol = NT1" is indeed a bad, bad idea from the security standpoint.

Check out this article: https://www.ixsystems.com/community/resources/how-to-kill-off-smb1-netbios-wins-and-still-have-windows-network-neighbourhood-better-than-ever.106/

The approach described in this article worked to fix the same or very similar problem in my case, and it might help you with your problem too.