The string typically refers to a digital music archive, likely sourced from a specific online community or a radio-rip (where "TFM" often stands for Tokyo FM or a similar FM broadcast source). Possible Meanings of "-TFM-" In the context of music file tags and filenames:
Experience the Pure Sound of Legend: Santana - Best Of (FLAC) Santana - Best Of - -FLAC---TFM-