If you want QQ Music on your mobile phone to not occupy the phone's internal memory, you need to modify the storage location to the SD card. Only in this way can you save the phone's internal memory.
Tools/Materials:
Mobile QQ Music
Method/Steps:
1. Open the QQ Music installed on your mobile phone.
2. After opening, click the logo in the upper right corner.
3. Click the Settings button.
4. Enter settings and click song storage location settings.
5. Click here to store to extended SD card, and then click I Got It.
6. This modifies the default song storage location.