https://itmanual.net/%ec%9c%88%eb%8f%84%ec%9a%b0-%eb%b6%80%ed%8c%85-usb-%eb%a7%8c%eb%93%a4%ea%b8%b0-%ec%9c%8810-%ec%9c%8811-%eb%b6%80%ed%8c%85%eb%94%94%ec%8a%a4%ed%81%ac/