1. Plug the USB device into another computer to see if it can be used. If this device doesn't work on other computers, then the laptop problem can be ruled out.

2. Replace other USB devices and insert the notebook to see if it can be used. If this machine can use other USB devices, then the problem of notebook computer can also be ruled out.

3. If it is confirmed that there is no problem with the external USB device, it is suggested to re-identify the USB driver, right-click the desktop computer icon and select Manage. In Computer Management, click Device Manager on the left. Then click the universal serial bus controller on the right. All USB devices can be seen at this time. Click USB devices with the right mouse button to uninstall USB devices one by one. Restart the computer after uninstalling. After entering the system, the USB driver will be re-identified, and the driver can be identified.

4. If all the above operations are invalid, it is recommended to take the purchase invoice, maintenance card and machine to the service center designated and authorized by Samsung for testing and judgment.