Some stuff I don't want to forget for hubackup so I'll put them here:

• Think about maybe integrating something into the installer, such that when a user is detected to have a CD/DVD drive and is interested in enabling hubackup desktop notification, the installer will offer him to create a special partition for storing the temporary archive and iso files before burning them.
• Add checks while backup is being created, such then when space is reaching too low, either abort the process with proper error or halt the dar process until user makes some more free space and then allow him to resume it.