SFTP - Windows Automation Script Bi-Directional Synchronization using WinSCP
WinSCP Script - https://goo.gl/alsVKn
WinSCP - Batch File - https://goo.gl/HTV6M3
WinSCP Download (download Portable) - https://winscp.net/eng/download.php
WinSCP Scripting Resource - https://winscp.net/eng/docs/scripting
Demo of using WinSCP to script the automation of synchronizing Remote SFTP directory with a Local Directory in a Bi-Directional upload and download