Force FTPS SFTP on Restricted Folders and FTP clients
In this tutorial, learn how to force FTPS SFTP protocols when connecting to your account via FTP client. Users using the web interface to transfer files connect through HTTPS which is a secure, browser-based transfer protocol. To learn how to force FTPS and SFTP, follow the instructions below:

To force an individual user to use FTPS and SFTP:

Go to the Users Tab and select the user you want to configure.
Scroll down to the user’s advanced options.
Check “Force FTPS/SFTP”.
To force all users to use FTPS and SFTP:

Go to the Setup Tab while logged into your admin account.
Scroll down to your advanced optoins.
Check “Force FTPS/SFTP for all users”.