To install Plex Media Server: Double-click the Applications icon on the NAS control panel desktop. Find the Plex Media Server entry in the app store. Click the Install button in the Plex Media Server entry, which will begin the installation. Once installation completes, continue with the information below to enable Plex Media Server to run.What is Plex cloud sync?
Cloud sync is a plex pass feature that optimizes media, and uploads it to your linked cloud storage accounts. Plex will stream from Google Drive, it's one of the supported cloud storage options for Cloud Sync. So yes I think it does belong here in /r/plex. He's asking for opinions on how to make it work best for him.