# Can not detect MKV files

**URL:** <https://forums.plex.tv/t/can-not-detect-mkv-files/577919>\
**Category:** General Discussions\
**Created:** [April 20, 2020, 6:46pm UTC](https://forums.plex.tv/t/can-not-detect-mkv-files/577919 "2020-04-20T18:46:38Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![FordGuy61](https://avatars.discourse-cdn.com/v4/letter/f/22d042/32.png) [@FordGuy61](https://forums.plex.tv/u/FordGuy61)\
**Post date:** [April 21, 2020, 2:27am UTC](https://forums.plex.tv/t/can-not-detect-mkv-files/577919/9 "2020-04-21T02:27:16Z")

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> [@KevinQ](#):
>
> I would guess it does not matter.

Your file naming and structure does not align with Plex requirements. See [TV Show Files (Naming & Organizing)](https://support.plex.tv/articles/categories/your-media/naming-and-organizing-tv-shows/).

Plex is incredibly picky with TV shows. They must be in a TV Show library. You must follow the recommended file structure and naming.

Rename `Wonders.of.Life.2013.S01E01.720p.BluRay.X264-SCENE.mkv` to `Wonders of Life (2013) - s01e01.mkv`.

For The Code, add a Season 01 subfolder and rename like Wonders of Life.

For BBC Horizon, you’ll have to use a Season 2008 subfolder and the appropriate season & episode number in the name. See [Horizon - Unknown - Season 2008 - TheTVDB.com](https://thetvdb.com/series/horizon/seasons/official/2008)

After you rename things, you should perform the [Plex Dance](https://forums.plex.tv/t/the-plex-dance/197064) for each show (the entire show, not just an episode). It clears bad metadata out of Plex’s database.

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