1. Connect the USB flash drive to the computer, and ensure that the computer correctly recognizes and installs the driver of the USB flash drive. If it is a new USB flash drive, it may need to be formatted.
2. Open the iTunes software on the computer and connect the Apple phone.
3. Select the device in iTunes, and then select the "File * * *" option in the left menu.
4. On the "File * * * Appreciation" page, select the song you want to export, click the "Save to" button, and select a USB flash drive as the export directory.
5. Wait for iTunes to export songs to USB flash drive, and then disconnect. In addition, if you use a USB flash drive that supports OTG function, and the Apple mobile phone also supports OTG function, you can directly insert the USB flash drive into the mobile phone, find the song to be copied from the file manager and select it, and then directly copy the song to the USB flash drive.