Plex Documentation → Your Media → Naming and Organizing Your TV Show Files
/TV <-- Plex TV library points here
../ER
..../Season 01 <-- "Season" in English. Two digits for season number.
....../ER - s01e01.mkv <-- Two digits for both season and episode numbers.
From the Plex documentation: " The most important bit in the file name is the appropriate season and episode number notation s02e17 which in this example means Season 2 Episode 17."
Plex reads metadata from mp4 files, if configured to do so, but not from mkv files.
When you do this, you need to do the full Plex Dance to remove any bad metadata from the Plex server database.
