After failed Docker update plex is showing playback error: Please check that the file exists and the

Plex Media Server NAS & Devices
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I have already written How-To’s for using Plex on DSM 7 (Synology changed the rules so we had to adapt)

I put together a rather large FAQ (Frequently Asked Questions)

It’ll show you how to get the common things done.

For giving PMS permission to see your files, start here:

Here’s the FAQ… It will explain the new username we have Plex can’t be used in DSM 7.