Local standalone metadata file

Plex on its own doesn’t handle such local metadata files.
There are however some 3rd party agents that can be used for that purpose – e.g. GitHub - gboudreau/XBMCnfoMoviesImporter.bundle

There’s an existing feature suggestion to provide native support for nfo files. You can vote/comment in that thread.

As for creating feature suggestions yourself, please post those in the Feature Suggestions category (though we’ll appreciate if you search for existing suggestions before “blindly” creating a duplicate that will cause votes/attention to be distracted/dispersed) :wink: