- Check if a power source is connected to the external hard drive or USB device.
- Check if the external hard drive or USB device is defective by connecting it to a different computer or device.
- Make sure the firmware and drivers of your laptop are up to date.
- Check whether the external hard drive or USB device is compatible with the laptop.
- Uninstall and reinstall all USB controllers and drivers.
- Check the BIOS settings and make sure they are correctly configured.
- Update the firmware on all your devices.
