I have plex on my nas 920+ synology and it still works…
I bought the expansion unit dx517 and made a 2 volume, made a map named main2 and there i put a couple of maps “uhd” “bluray”…
plex wil see the map main2 but all the sub folders it will not see it, all the media in all the maps it wont see even if i put the media in main2 folder…
Nothing changed with plex on the first 920 nas but i dont know why not on the dx517…
If i go in win explorer i see the folders and can play the data