provides extensive free melody loops and starter packs often used to create sad or dark trap beats.

(searching "Free Sad FLP") provides numerous walkthroughs where the project file is included in the description, covering genres like emotional piano, lo-fi, and rap.

Here are the top sources and types of sad melody FLP files available:

offers a variety of sad, gloomy, and melancholic piano/guitar loops that can be dragged directly into FL Studio. Common Characteristics of Sad Melodies How To Make SAD Piano Beats (FL Studio 21)

offers a wide selection of free FL Studio 20/21 project files, including "Emotional Piano Hip-Hop" beats.

Several resources offer free, high-quality sad melody FLP (FL Studio Project) files, particularly focused on emotional piano, trap, and lo-fi genres. Many of these projects include all necessary samples and stem files, with some requiring only stock plugins.