How to create sub-folder in TV Shows

How do you create TV Show sub-directories, i.e. folders to reflect the name of the series that it contains? I downloaded 8 episodes of a series and was able to save them in the default folder i.e. TV Shows but would like to add a sub-folder to the primary one the that reflects the name of the series, so I don’t end up with multiple directories or lots of shows all stored in the TV Show folder. Please try and keep the directions as simple as you can I’m not particularly literate when it comes to doing these kinds of things. Assuming I can create a sub-folder with the name of the show and move the show episodes into the folder how do I get it to appear i n my menu?

Any help you can provide would b appreciated.
Have a safe and happy holiday season.

Here’s how to best organize/name episodes for Plex to pick them up and properly recognize them…
https://support.plex.tv/articles/naming-and-organizing-your-tv-show-files/

All TV Shows must be in their own folders named after the show (use the official naming convention linked by Tom), and all these folders must be in the ROOT of your TV Shows folder:
(e.g. TV Shows/Batman The Animated Series (1991)).
If you try to do sub-foldering:
(such asTV Shows/Batman/Batman The Animated Series (1991)),
you will have problems, as Plex will look at the name of that sub-folder Batman and assume that ALL files within it are from that show. It will first try to find a show called Batman and pick… probably the classic show with Adam West or something… and fill all episodes under that. That is bad.