Long defrag and used HD space?

The new version of of Defraggler is taking forever to defrag my HD, I usually only do the files that are used most often but yesterday I decided to do the whole drive and after 5 hours it was only 85% done and each 1% was taking over a hour to do, the other thing is is I had 79.7GB free before I started the defrag and as it was going it went up to 95.4 so I finally stopped it.