A great tool for your website that is mainly free! Code Guard will backup your website.
You give the Code Guard website app your FTP details and then very 24 hours it will download a copy of your data and save them safely. This is good for backup purposes, protects you from loss of data/attacks.
You may be charged if you ever need to download your data. Even so, it's certainly a good choice to have in the event of some problem.