In the world of digital music libraries—whether on iTunes, Winamp, foobar2000, or Plex—metadata is king. The "01" at the beginning of the file name typically indicates the track number. This suggests that the song is the opening track of an album, EP, or single release.
When you download an M4a file, you are often getting a file that has been mastered for digital distribution with care. 01 Die With A Smile M4a
Think of songs that use a similar motif: In the world of digital music libraries—whether on