First of all you should download FTP client software.we recommend WInScp or FilleZilla for that.
WinScp - https://winscp.net/download/WinSCP-5.17.7-Setup.exe
FileZilla - https://download.filezilla-project.org/client/FileZilla_3.49.1_win64_sponsored-setup.exe
Download One of these software and insert your logging details correctly.
Hostname - IP (without port eg:35.35.35.35)
Username - ftpusername
Password - ftppassword
Protocol - sftp