Try a different USB port. Some Jieli chips are sensitive to USB 3.0 interference; use a USB 2.0 port if available.
Jieli BR21 Driver: Verified Solutions and Installation Guide jieli br21 driver verified
If the device is stuck in storage mode, you may need usb-modeswitch to force it into audio mode using: sudo usb_modeswitch -v 0xe5b7 -p 0x0811 -W . Try a different USB port
If your computer sees it as a storage device or doesn't show the Bluetooth icon, it is likely because the device is in the wrong "mode" or is waiting for an audio connection. How to Install and Verify the Jieli BR21 Driver 1. Windows 10 & 11 (Auto-Recognition) jieli br21 driver verified