[Trisquel-users] Re : Large Volume FOSS Backup Options

[lcerf]

We are not talking about the same thing.  I thought you were talking about  
end-user multimedia files (jpeg, png, mp3, vorbis, mp4, webm, etc.): those  
are formats that are compressed with algorithms that take into account the  
specifics of the medium, thereby reaching better compression ratios that what  
generic algorithms (gz, bzip2, etc.) achieve.

Trisquel's default tool for backup, Déjà Dup, is incremental too.  It is a  
graphical interface to 'duplicity'.  Unless DéjàDup, 'duplicity' can be  
tuned and probably can do what you want.