Download the WinSCP installer from the official website at the link
Install the program
After installation, the main menu of the program will open
Host Name (or IP address) — MikoPBX IP address Port — the default port for SSH connection is 22 User name — always specify root Password — SSH password of your MikoPBX
Before connecting, you need to allow password authorization in the MikoPBX web interface, as well as set a password for connection: to do this, go to "General Settings" -> "SSH"
To connect, click "Login"
After successful connection, the MikoPBX root folder will open for you