Specific steps:

1. Take out the memory card of the Bluetooth headset, 2. Insert the card reader and connect to the host, 3. Operate on the computer, open the music player software, and click on the page Select the song you want to download, use the mouse to click on the menu on the right side of the song and click "Download". After downloading, find the song in the "Downloaded" section of the download management and copy it to the memory card.