要复制文件的Windows批处理文件允许重命名的文件扩展名，但不能复制重复项

I want to copy files from two directories on a remote computer to a single directory on a windows server. In one directory I have files with the extension *.csv and in the other *.asc. Drives have been mapped with the UNC convention so we have drives such as Z:\ which are mapped to a specific folder on another computer. The scripts can reside in either the remote computer or on the windows server.I want to copy files from two directories on a