YADSync (yet another directories sync) is a simple tool to easy synchronize a set of directories. This allow you to save your important documents on different locations just in case …
All you need to do is to specify what directories to synchronize and what to exlude from this directories (hidden, backup, temporary files).
This kind of backup is not as fancy as backintime but is more suitable for photos, music or other kind of files that don’t change (or you don’t care about changes). So if you just need to duplicate some files this may be the right tool to you.
Currently there is only a Gnome version.
With a little effort it is possible to run the application on Windows. For more information read Install on Windows page.