当U盘插入时能够自动识别，并删除U盘里的资料，而且当U盘内容太大时，能够禁用粘贴功能-When the U disk, when inserted automatically identify and remove the U disk inside information, but the content is too large when the U disk that can disable the paste function

本程序简单的实现了u盘的识别，需要的朋友可以下载。-The program is simple to achieve the u disk identification, a friend in need can be downloaded.