2. change a computer. If possible, your computer may have blocked the USB function. Solution: Right-click my computer and select Properties-Hardware-Drive Signature. Select Ignore here, and then click OK. Then plug in MP3. If you still can't connect, right-click My Computer-Properties-Hardware-Device Manager to find the USB controller, right-click and scan for hardware changes.

3. If the method in 2 still doesn't work, it may be that your USB cable is in poor contact or the USB interface of the computer is not powered enough.