This video covers how to use FTP (Filezilla)
Correction: At the end of this clip I mention that an ftp addresses should always be in the format ftp.domain.com.au and to avoid anything like "http://" or "www", or "@" symbols etc. Whilst this is generally true (and inclusion of these is probably the most common cause of errors), nevertheless sometimes your host will give you an FTP address like www.domain.com.au instead of than ftp.domain.com.au so occassionally you will need to use www... instead of ftp...