You can use a FTP Client to upload/download files with SSL secure connections:
1. Find your server name by checking under the 'Server & DNS' tab in your admin panel.
2. In your FTP Client, use the server name as the FTP server, with the usual port 21 (called 'FTPES' protocol in the FileZilla FTP Client).
3. Use "AUTH TLS - Explicit" Protocol for file transfers.
Note: If you use CuteFTP, put a check in the ' Clear Data Channel' checkbox.