Free gnu sftp server filezila ftp server

 Filezila ftp server is an open source GNU ftp server. You can download it from:
 http://filezilla-project.org/download.php?type=server 

It is easy to setup.  In edit menu after connect to server locally (127.0.0.1), create a  user and password, and  create share directory D: drive. You have  the option to use SSL. To remotely connect to the server, you can use Filezila client or Fireftp etc.