Plex not seeing media on Raspberry Pi 3 mounted Synology NAS

@savenelroy As mentioned a thousand times in this forum, the guide you have used is completely broken and a bad start for setting up PMS on your Pi. Your PMS is still running as user plex on your Pi, regardless what’s told in the above tutorial.

Here is our “official” guide:

READ ME FIRST: About Server armhf (arm64) Debian / Ubuntu / Raspberry Pi

I just skipped over the above posts and I understand that you are now able to manually mount your NAS share correctly at /home/plex, correct? It just does not mount on reboot? So that’s most likely a network issue, i.e. network not available on restart. That’s usually an issue if you use Wi-Fi. What’s your network setup?