1. Non-video machine: Download MP3 or WMA format audio files to the USB flash drive, it is recommended to delete unnecessary files and directories to avoid multiple layers of files affecting data reading, then turn on the speaker, insert the USB disk into the USB interface, press the "Input Selection" button to switch to the audio input mode, the audio will automatically read the files in the USB flash drive and play it. 2. Video all-in-one machine/song orderer: Insert the USB disk into the USB interface, click the "USB disk" option on the screen, Then select audio or video to play the corresponding file, support wav, mp3, ape, m4a format audio files and mp4, mov, mpg, mpeg, mkv format video files, audio/video files are recommended to be put in the song folder in the root directory of the USB flash drive