To download file using FTP download, you need to install Filezilla firstly. You can download Filezilla here
After installed, open Filezilla and fill in Host, Username, Password, and Port. Then click on Quickconnect.
Once you connected, click on home at the right. Then the compressed data record will appear on the bottom.
You can download the data record by click on the compressed file and check the download status on the Successful transfers menu at the bottom.