Complex sentence: The album found some success on the "Billboard" charts, reaching the top 40 on both the Top R&B/Hip-Hop Albums and Top Heatseekers, it found it's greatest success on the Top Reggae Albums where it peaked at number one.
Split into simpler sentences: The album found some success on the "Billboard" charts, reaching the top 40 on both the Top R&B/Hip-Hop Albums and Top Heatseekers. It found its greatest success on the Top Reggae Albums chart, on which it peaked at number one.