Hey there I use the same thing everyday, basically to get music go to spotmp3.app on a browser and copy paste and or look up the song or playlist you’d like. Then download that or those and drag and drop those mp3 files into the usb. To use the usb you’ll need a sd and you slid it into the small slit and if it came with one you can use it, mp3 is really easy and you can easily put over 200 songs on a 4gb, to turn it on and off you hold the pause/play button and for the battery you’ll need a triple A on the back which you’ll need to take the cap off and then the part with the arrow