How To Create Sub-Directories?

I am a new user of Plex but have so far managed to create one library, of which I have added 5 series of a show.

However, it is looking a bit messy and want I want to do is have the library broken down into individual directories of the series, e.g. Series 1, Series 2, etc.

So, I went into the directory on my NAS that holds the content and I created a folder, Series 1, and copied the episodes for that series into the directory.

I then scanned the library, but this did not show the directory, just all the episodes as it did previously.

Where am I going wrong, and I apologize if the terminology I am using, such as directories, is incorrect.

Plex already has support for series. It can also present them in your desired format.
What you have to do is to use a dedicated library type for these.

https://support.plex.tv/articles/categories/plex-media-server/libraries/

https://support.plex.tv/articles/naming-and-organizing-your-tv-show-files/

@OttoKerner Thank you, I’ll take a look at the links you provided.