[gazzaboo]

I have just brought a copy of SuperDuper and I am trying to create a bootable backup of my main harddrive (Intel G5 10.4.9). My drive is 250gig in size with only 30gig of data on it, but I keep ending up with a 200ishgig disc image when the drive only contains 30gig of data to backup? Any ideas, thanks in advance.
Gazza