What are you using (e.g., Windows 10, Windows 11, Linux)?
This is the most common complaint among Windows 7 and Windows 10 users. The USB Mass Storage device is simply how the BR21 chip presents its configuration partition. It is not a driver error. Do not attempt to install drivers. Eject the drive if necessary, but do not format it. You must use the device via its audio interface, not the storage interface.
If using Linux, the device might need to be switched from storage mode to audio mode using usb_modeswitch . jieli br21 driver link
primarily manufactures Bluetooth chips (SoCs) for other brands rather than consumer-facing peripherals
The is not a single official URL but a recurring need for embedded developers and repair technicians. The correct driver is a small .inf + .sys package, usually included within factory firmware release ZIPs. If you cannot obtain it from your supplier or an SDK, community archives (with caution) are the next best source. Always verify digital signatures or use in an isolated VM for safety. What are you using (e
: The official developer portal for JieLi is hosted on GitHub (Jieli-Tech) , where they provide update tools and documentation for various chip series including BR17, BR21, and BR22.
Unplug the USB, restart your system, and insert into a instead of USB 3.0. Audio is paired but status shows "No Connectivity" Windows sound routing conflict. It is not a driver error
If your device isn't being recognized, it is likely a third-party product using a Jieli chip: Manufacturer Website