According to our supplier, you can get help here:
The Sonos support page provides the following support on this topic.
Setting up a NAS, together with Sonos.
https://support.sonos.com/s...
Troubleshooting using a WD MyCloud NAS.
https://support.sonos.com/s...
Error in the Sonos music library when using a WD MyCloud NAS | Sonos
Sonos music library errors when using a WD MyCloud NAS. In this article, you will learn how to configure MyCloud so that Sonos can use your WD MyCloud NAS drive as your Sonos music library.
support.sonos.com