You're much better off enabling the DLNA server in MoodeAudio as smb browsing in the WiiM Home app is very basic. Once enabled in Moode the server will appear under Home Music Share in the WHA.
It looks like Moode uses the label of the USB key as the share name, which isn't very helpful
, so mine was:
Code:
\\192.168.**.**\INITDISK R5
If you're on Linux you can list the shares available on a server by running:
Code:
smbclient --nopass --list <target-ip>