How to access files that are not in the Site directory (IIS virtual directory settings)

Most of the time, upload more files, set up the original server settings of the main directory disk space is often not enough, how to do? This requires setting up the virtual directory. A virtual directory is a mapping of other directories to the FTP server's home directory, so that the main directory of an FTP server can essentially include many different drive characters, different paths of the directory, without being constrained by the disk space.

Different sites can set the same virtual path

How to access files that are not in the Site directory (IIS virtual directory settings)