This article covers all aspects of backing up data that the FIFE project works with and relies on.
The website (the filesystem of it) and the whole developers FTP get manually backed up about once in 2 months. This does not involve the data that is stored in the MySQL database.
The MySQL database that contains the information of our website's CMS and this very Mediawiki gets automatically backed up daily. FIFE developer User:Phoku did set up a cronjob for it that runs on his home server. The backups are stored in a folder that is not accessable with a normal web browser. You will need access to the FTP root to download the backups. User:mvBarracuda downloads the backups once a week and deletes them from the server after he has saved them locally on his PC.