FileZilla free FTP Client will be used as an example in this tutorial. Download link:
The following details are required to setup the connection: Host
(3) and Password
You can find them by following to Your Gameserver → FTP
Start FileZilla FTP Client.
Fill out the connection details as shown on the screenshot below.
Press the Quickconnect
There is a pop-up is shown upon the first connection. Press OK
FTP connection is now established. You can edit, download and upload files.