If you can provide context (e.g., is this a song on a keyboard, or a firmware file?), I can provide the exact steps. To give you the exact steps, could you tell me:
However, since this appears to be a specific audio file or product, here is how to find the proper guide: RJ433161.mp3
Ensure the USB drive is formatted to FAT32, and the file is in the root directory for the keyboard to read it properly. If this is a Ruijie Reyee Access Point: If you can provide context (e