Through a series of operations.

1. Insert the USB flash drive first, otherwise an error message will appear. 2. After opening the software, the software will automatically identify the USB flash drive or MP3 player. 3. The original song sorting will be arranged in order in the left column. Select the song you want to play first, double-click the song name, and the selected song will be reflected in the priority list. Or drag the song to the desired location. 4. Do not change the default type and sorting method. 5. Click "Save" after the operation is completed. U disk, full name USB flash disk, English name "USB flash disk".