All,
I just installed Leap 15.2 on a machine that had KDE Neon and was able to access both my WD MyCloud and Buffalo NAS without issue. I assume you’ve set the minimum protocol way too high for these devices. Would like to know where to tweak the settings so my devices could be found.
Hi
In /etc/samba/smb.conf in the global section set protocol etc… the default upstream has set that 
Upstream samba release notes…
https://wiki.samba.org/index.php/Samba_4.11_Features_added/changed#SMB1_is_disabled_by_default
Buffalo NAS knowledge base…
https://www.buffalotech.com/knowledge-base/windows-10-cannot-access-shares-on-nas
Windows 10 cannot access shares on NAS
In the latest updates for Windows 10 (and possibly other Windows versions, including Server 2016) Microsoft disabled the SMB version 1 protocol. The reason for this is this early version of the SMB protocol is inherently insecure and is considered a security risk.
Most older Buffalo NAS devices do not support SMB version 2 or above. Currently there is no plan to update these older NAS devices to add support for newer SMB versions. It is therefore recommended that data on these units be migrated to a newer platform and the older NAS retired. All current Buffalo NAS units support SMB version 2 at a minimum, and the TS3010 and TS5010 series support SMB version 3, which is currently the newest version of the SMB protocol.
However, we understand that many users want to continue to use their existing NAS. In order for this to work, it’s necessary to re-enable the SMB version 1 protocol. Please keep in mind that doing so will expose the system to additional security risk.
The same applies to clients using samba 4.11.0 onwards.