Oh, I also use SMB for that. A local file share is more than enough for anyone who lives alone, in a cave, and who never has never physically interacted with another person -- and who never wants to.

Plex, meanwhile? It is much more approachable by the lays.

My elderly mother can watch my media with a cheap little Roku box while she sits on the sofa at her house many miles away with a remote control in her hand, using Plex.