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:
Based on typical naming conventions, "RJ433161" suggests a file related to a musical instrument or a Ruijie networking product . RJ433161.mp3
Refer to the Ruijie installation guide to understand the device function. Ensure the USB drive is formatted to FAT32,