FTP stands for File Transfer Protocol and is exactly what its name suggests a method of transferring files to and from your site.
This is by far the quickest and easiest way to upload, download or backup folders, pages and images to and from your site.
To use FTP you will first need an FTP program. There are many available on the net some free some not.
For a nice free simpler FTP programme we recommend Core FTP
If you want really fast and are quite good with learning how to use new software we recommend FileZilla from Firefox this is the programme we use in the office. Filezilla is a stand-alone programme it does not matter whether you use Firefox or not.
Once you have downloaded and installed your chosen programme see the FTP settings page to learn how to connect to your account.