https://blog.faceutil.com/2017/03/30/teracopy-%eb%b3%b5%ec%82%ac%ec%86%8d%eb%8f%84-%eb%b9%a0%eb%a5%b4%ea%b2%8c-%ed%95%98%eb%8a%94-%eb%b0%a9%eb%b2%95-%e3%8e%9b/