Or better asked: what is in the WP database? Do I backup all my blog files, including plugins, their settings, widgets and their content or settings, themes and settings etc.?
It is an interesting question because a full backup with with DirtectAdmin backs up ALL my stuff and generates a 1,5 MB file. If I want to store that somewhere else, I use 1,5 MB of bandwidth every time I FTP it off site.