Remember doing this with my old samsung j5. It had 16gb of storage i had to put a custom rom on it bc of all the bloat but i could enjoy my playlist which was composed of jazz, classical, edm, hip-hop and jpop. Most of the space was consumed by hundreds of flac monstercat tracks. Then i finally got an sd.(and yes i paid for the monstercat it was really cheap)

Wtf do you have a external HDD attached to your phone?? Here I am clearing out gifs every few months lol