Question - Anonymous Samba Share Permissons

Hello - i've got an anonymous Samba share setup on an Ubuntu 20.04 installation as follows:

[global]
    map to guest = Bad User
    log file = /var/log/samba/%m
    log level = 1
    server role = standalone server

[ubuntu-media-share]
    path = /srv/samba/ubuntu-media-share
    read only = no
    guest ok = yes
    guest only = yes

On a remote Debian 12 server, I have the share mounted in /etc/fstab as follows:

//10.0.0.5/ubuntu-media-share   /media/ums      cifs    guest   0       0

However, I can only access this file share on the remote server as root. What am I missing to make this server accessible as any other user? In particular, I have users in the media group that need to read/write that directory.

Any help is greatly appreciated. Thank you!

Edit: codeblock formatting