Plex Woes: Deleting Libraries, Deleting Folders In Libraries, Naming TV Shows

From your Volume called Media, create a Folder Called Home Videos. You will also have to create a Home Videos Library and link storage directory.

Example:

/Volumes/ Media/ Home Videos

When completed Drag and drop the titles Home Video to that location. When Completed Open Plex Server and Go to Movies Library, where you will find a vertical Ellipsis.

Empty Trash.

I have also noticed your naming of Titles files are incorrect and may cause issues. Example: Lots of Periods added and not using a space and Hyphen.
Example:

Around the World in 80 Days (2021)
/ Around the World in 80 Days (2021) - S01E01.mkv
/Around the World in 80 Days (2021) - S01E02.mkv

After renaming, Refresh your metadata

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

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

Result:

Another way to Delete a file is from the Get Info panel:

Delete a Folder:

Drag the Folder marked Photos or Music in your storage Volume with all your files inside and drag them from the Drive. Then Go back and manage the Library, unlink and delete Library/