The method is as follows:
Tool: Huawei P20
Operating system: EMUI 10.0
Program: Kugou Music v8.21
p>1. First find Kugou Music on our mobile desktop and click on it.
2. Then click on the three horizontal bars on the upper left side of the screen.
3. Then click Settings.
4. Then click on the song download directory.
5. Finally, select the storage location as the built-in SD card.