I'm not sure if I understand correctly, so asking. I often forget to back up my laptop. USB drive not connected, or doing something else, or.... So, I decided to synch to Ubuntu One.
On reading up, however, it looks like I want to go into Settings, enable backups, and backup once weekly to Ubuntu One. I did so, and am happily backing up - knowing I WILL toast a harddrive or decide to format and go again. So - deja-dup is for backups, and I do this in settings, and if my /home directory is bigger than 5 Gigs, I should pop for the 20 Gig increment? Or are backups priced differently?
My mobile phone does not have a data plan. I use it as an MP3 player, and manage it with Banshee. So I just use Banshee and a USB cord to sync music. My 5 Gigs and 1800 or so MP3's don't need to be synched. If I wanted to, though - I might consider synching my Documents and Pictures directories. But I'm not really synching to any other devices, so I'm really only keeping an online folder mirroring my laptop folders, right?
So, even if I'm only synching a Gig or so of data, I might need to pop for the 20 Gig increment if I want to backup my home directory weekly, right?