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Do not go back to the beta version. It is not fully compatible with the production release of DSM 7. There have also been changes in Plex Media Server, so going back is not feasible anyway.
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Do not put your media in the /PlexMediaServer folder. It is reserved for the Plex application. If you put media in that folder the DS920+ will catch fire and melt to the ground
(OK, not really, but it definitely will not work correctly). -
Read/write for the media folders is a good thing. Make sure you give access to the System Internal User PlexMediaServer. That is the username that runs the Plex software (it was “Plex” under DSM 6). Additional Info.
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To claim the new Plex server on the Synology, from a system on the same network, point your browser at the IP address of the NAS: http://use_real_ip_address:32400/web.
You may see a “this application is not hosted at Plex” message. That is OK. It just means you’re logging directly into the server, not using app.plex.tv.
Due to a “quirk” of DSM 7, you cannot claim the server using app.plex.tv, Synology Quick Connect, any type of Dynamic DNS system, etc.
Some additional information:
Discusses location of Plex data folder and other packaging changes under DSM 7:
DSM 7 - Packaging 2.0 (PMS 1.24.2.4973) - Release information
Original installation & migration instructions for running Plex on DSM 7:
DSM 7 - Plex Media Server - Release Info & Migration instructions
Plex on Synology FAQ:
Synology FAQ - Questions, Answers, and a few How-To’s
