First, we directly click to enter QQ Music, then click "More" and select "Settings". As shown in the figure:
Secondly, under the settings page, we can see "song storage location settings", which is the storage disk -qqmusic-song mentioned above, and this is where music files are stored. As shown in the figure:
Third, click in, you can enter the corresponding location and find all the songs saved in your mobile phone.