Hi all, I have a SONOS AMP S1 from 2015. I connected my NAS Synology and listened to my music from my NAS. From many months, I am not able to connect my SONOS to my NAS.

I did some upgrade to my SONOS. Can it be the source of the issue?

Which protocol is used to connect the SONOS to the NAS? (CIFS? wich version is/are allowed?)

Here is the version:

Sonos OS : S1

Version : 11.14

Version material : 1.16.5.5-20

WM : 0

OTP : 1.1.1

In advance thank you for your help.