: A wired Ethernet connection is strongly preferred over Wi-Fi for stable streaming.

If you tell me your and how many people will use the server at once, I can recommend a specific hardware setup. Plex: Free vs Paid

: Media files are large. You will likely need internal or external hard drives to store your movies and shows.

: Plex does not share information about your personal content with third parties. Software Costs Plex Media Server Hosting and organizing your media. Plex Pass Monthly/Lifetime