Based on standard naming conventions in the music trading community:
: Indicates a compressed archive containing audio files (often FLAC or MP3), setlists, and sometimes concert photos. Primary Repositories for Bootleg "Shows"
: This likely represents a date format ( August 1, 2021 or October 8, 2021 ) or a specific catalog number used by the uploader.
: Music trading communities on Reddit (like r/musichoarder) or Facebook often maintain links to mega-folders or private servers containing these archives. Concert Archives - The concert database for fans, by fans.