Hi! Not sure whether this is a question or a conversation starter...
I got error 900 trying to add the music library on my Synology NAS to my Sonos system. It had been working flawlessly in the past, so I suspected it had to do with a recent update I'd made to the DSM operating system on the Syno. Now running DSM 6.1, for the record.
I then found that I'd tampered with the Windows file service after installation and set the SMB service to only allow clients supporting SMB2 and up. That's what caused the issue! Setting the SMB service on the Syno back to SMB 1 and up solved it.
Which leads me to ask: will Sonos consider updating their samba support to a more recent version? With time, surely new network devices will rely on the more recent versions of samba..?