The M4B format is essentially the gold standard for audiobooks. Unlike standard MP3 files, M4B files are based on the MPEG-4 Part 14 container and support "bookmarking." This means that if a listener pauses a twenty-hour book to take a call or sleep, the media player will remember the exact second they left off. Furthermore, M4B files allow for metadata-rich features like chapter markers and cover art, which turn a single long audio file into a navigable, book-like experience. When a user looks for a "Season 02" upload in this format, they are looking for a seamless, organized transition from the first volume of a series.
An file is a specialized MPEG-4 audio format used primarily for audiobooks . Unlike standard MP3s, M4B files support: upload s02 m4b
Medium / High (if S01 upload already supported) The M4B format is essentially the gold standard