Moved photos to a Plex folder but they don't show up in the library? Or added a series and half the episodes weren't recognized? Plex Media Server is one of the most convenient tools for organizing a home media library. But it has strict rules for file naming and folder structure. Without them, your media library turns into a jumble of "Unknown Movie (2000)" and missing cover art.

Let's break down how to properly prepare content so Plex picks it up on the first try: from file formats and resolution to directory structure and library creation.

💡 Quick overview:

• Prepare photos and videos in Full HD resolution and Plex-supported formats
• Organize folders using the "year-month-day Title" scheme for photo content
• Create a library of the appropriate type in Plex and specify the path to the media folder
• Verify that the nesting structure matches the content type (Movies, TV Shows, Photos)

Step 1: Prepare media files, formats, and resolution

Plex supports dozens of formats, but for predictable operation it's better to stick with proven ones. In practice, no issues arise with files that meet basic requirements.

Photos

The optimal resolution for photos in Plex is Full HD (1920×1080 pixels, Plex documentation). At higher resolutions, the server will spend resources on transcoding; at lower resolutions, quality on a large screen will be mediocre. Formats that Plex reads without surprises:

• .jpg / .jpeg, the primary format, works everywhere
• .bmp, supported but files take up a lot of space
• .png, also works but is excessive in size for photo albums

Plex also supports .tiff and .gif, however animated GIFs play as static images.

Video

The baseline resolution for video is the same Full HD. Plex can transcode on the fly for the viewing device, but a 1080p source provides the best balance of quality and server load. Proven container formats:

• .mkv, the most flexible, with support for multiple audio tracks and subtitles
• .mp4, universal, natively readable by almost all clients without transcoding
• .mts / .m2ts / .ts, transport streams, typical for camcorders and TV recordings

Note: the container format and the codec inside are different things. Plex works excellently with H.264 and H.265 (HEVC). The situation with AV1 is improving, but support is not yet universal; if in doubt, re-encode to H.264.

Step 2: Organize folder structure, the main Plex rule

Plex doesn't guess content by file contents. It analyzes the file name and path, then matches against databases like TheMovieDB and TheTVDB. An error in the folder or file name = "unknown content" in the library.

Basic hierarchy

Create a root folder for each media type. Don't dump movies and series into one directory; Plex will get confused and ignore some files:

1
/Media
2
   /Movies        ← movies
3
   /TV Shows      ← series
4
   /Music         ← music
5
   /Photos        ← photos

In Plex library settings, you specify the path to the type folder (/Movies, /Photos), not to the root /Media.

Naming movies

The Plex-recommended format is each movie in its own folder:

1
/Movies
2
   /Avatar (2009)
3
      Avatar (2009).mkv
4
   /The Dark Knight (2008)
5
      The Dark Knight (2008).mp4

You can also skip individual folders: Avatar (2009).mkv directly in /Movies. But folders speed up scanning and allow you to store subtitles and posters alongside.

Naming TV shows

1
/TV Shows
2
   /Breaking Bad
3
      /Season 01
4
         Breaking Bad - S01E01 - Pilot.mkv
5
         Breaking Bad - S01E02 - Cat's in the Bag.mkv

The S01E01 format is critical; without it, Plex won't determine the season and episode number.

Naming personal photos and videos

For personal content (not movies or series), Plex uses Photos and Other Videos library types. Here the structure is more flexible, but we recommend the "year-month-day Title" scheme, as it's convenient for navigation:

1
/Photos
2
   /2025
3
      /2025-07-15 Crimea Vacation
4
         DSC0001.jpg
5
         DSC0002.jpg
6
      /2025-12-31 New Year
7
         IMG_0100.jpg

Use this same scheme for home video in the Other Videos library:

1
/Other Videos
2
   /2025
3
      /2025-06-20 Graduation
4
         video_001.mkv
5
         video_002.mkv

Step 3: Create a library in Plex and add folders

• Open Plex Web App (usually http://localhost:32400/web or through the app).
• Click the settings icon (wrench) in the upper right corner.
• Make sure the correct Plex Media Server is selected.
• In the Manage section, select Libraries.
• Click Add Library.
• Choose the library type: Movies, TV Shows, Music, Photos, or Other Videos.
• Name the library and select the language for metadata (for Russian titles, Russian).
• Click Next and use the **Browse for Media **Folders button to specify the content folder.
• Click Add Library, and Plex will begin scanning.

After scanning, movies and series will receive covers, descriptions, and ratings automatically. For personal photos and videos, metadata is not fetched; the library simply displays files in chronological order.

Step 4: Transfer content to the Plex network folder

If Plex Media Server is installed on a separate computer or NAS, and you're preparing files on another device, follow these steps:

• Prepare content locally: bring photos to Full HD resolution, save as .jpg, ensure acceptable quality.
• Create a folder using the "year-month-day Title" scheme, for example, 2026-06-14 New Photos.
• Move the prepared files into this folder.
• Open the Plex network folder (the network share on the machine with Plex Media Server).
• Navigate to the appropriate content type folder (Photos / Other Videos) and then to the year folder.
• Copy your folder inside.
• Run a library scan in Plex: open the library, click the three dots, and select Scan Library Files.

Plex will detect new files during the next scheduled scan or immediately after a manual trigger.

Step 5: What to do if content doesn't appear in the library

The most common cause is an incorrect file or folder name. Check:

• Movies: does the folder/file name contain the release year in parentheses, Avatar (2009).
• TV Shows: does the name include S01E01 (season and episode), and is the parent folder named after the series.
• Home video and photos: go to the library → select "Folder view" display, not "By date added." Plex defaults to showing chronology for such libraries, not the directory tree.
• Access permissions: the user running Plex Media Server must have read permissions for the network folder. On Linux and NAS this is a common issue; check chmod and ownership.

The second common case is that Plex "doesn't see" the format. For Movies and TV Shows libraries, it expects video files. If you added a .jpg to the Movies folder, it will ignore it. And conversely: .mkv in Photos won't display. Each content type needs its own library.

⁉️🤔 Frequently asked questions

Can I add one folder to Plex for both movies and series?

No, and this is fundamental. Plex requires that movies and series reside in different root folders. If you specify one folder for both Movies and TV Shows libraries simultaneously, the scanner will confuse content types: a series might be identified as a collection of short films, and a movie as one episode of a nonexistent show. Separate content into different directories.

What's the minimum photo size for Plex so covers display properly?

Plex doesn't impose a strict minimum resolution limit, but for comfortable viewing on a Full HD TV, aim for standard Full HD resolution. Photos smaller than 720p look blurry on a large screen. The most resource-intensive option is loading RAW files: the server will try to transcode them and may "choke" on a weak NAS.

Plex shows "Unknown Movie," how do I fix it manually?

Click the three dots on the poster → Fix Match → enter the actual title in English. Plex will offer options from the TheMovieDB database. Select the correct one, and metadata will be fetched. If the movie isn't in the database (rare, local), mark it manually via Edit → fill in the title and upload your own poster.

Can I store media files on the same disk where Plex is installed?

You can, and for small libraries this is the simplest option. But if you plan to grow, move media to a separate disk or NAS. This makes it easier to expand storage and create backups. The main thing: don't put media files in Plex system folders (where it stores its database and metadata).

How often does Plex scan folders for new content?

By default, on server startup and then periodically. The interval is configured in Settings → Library → Scan my library periodically. Manual scan triggering is instant. If your media library is large (hundreds of gigabytes), automatic scanning can create unnecessary disk load: in this case, disable periodic scan and run manually after adding files.

What to remember about adding content to Plex

With Plex Media Server, you get a personal Netflix from your own files. But the media library works exactly as well as how carefully you prepared the content. Three rules that will save you from typical problems:

• Formats and resolution: photos, Full HD, .jpg; video, 1080p, .mkv or .mp4 with H.264.
• Folder structure: separate root folders for each content type; movies with the release year in parentheses; series with S01E01; personal content using the "year-month-day Title" scheme.
• Libraries: create a separate library for each media type and specify exactly the folder where files of that type are located.

If some files aren't recognized after scanning, don't recreate the library. Go into it, switch to Folder View, and check file and folder names. In most cases, the problem is specifically with naming. Plex handles the rest on its own.