1. Connect the iPhone7 Plus to the computer using the original data cable. Remember to use the original data cable, otherwise the software cannot recognize the iPhone7 Plus device.

2. Open the iTunes software, wait for it to recognize our iPhone7 Plus device, and then click the "iPhone" icon in the upper right corner.

3. Find and check the "Manually manage music and videos" option under the iPhone summary interface, and then click the "Apply" button on the lower right.

4. After waiting for the application to be completed, please click the "This iPhone" option in the top navigation bar

5. See the music management interface on the iPhone.

6. Open the folder where the music is stored on your computer, and then manually drag the music you want to import to the music in iTunes.

7. The status bar at the top of iTunes shows that music is being uploaded to the iPhone. If the music is successfully imported, a small check mark will be displayed on the left side of the music.

8. Go back to the iPhone7 Plus, open the music app, click on the song to see the music we just imported on the computer.

9. If you find that the music is not uploaded to the iPhone7 Plus, please click the "Sync" button in iTunes to try.