Are few quick defrags the same as one "ordinary" defrag? in Defraggler Posted August 22, 2012 Thanks for making it clear now. And yep, I already used those custom settings. After I do one full defrag, it will probably show 0%. Now I'm ok with 5/6%. It doesn't matter which way you defrag with Defraggler as far as what % is still fragmented when your done. It should be the same unless you defrag only some files from the file list way. The full defrag adds more than just defraging the file system. What files do you see in the file list when you analyze after defraging? They may be unmovable files. Edit: I never thought of looking at the technical information part of the documentation. D'oh! Technical Information What Defraggler does Defraggler scans the hard drive for folders and files that are scattered in non-contiguous clusters (clusters that aren't right next to each other). Using a single-pass algorithm, it designs an optimum layout for these files so that Windows will spend the least amount of time retrieving them in the future. Finally, Defraggler moves the files into this optimum pattern. This explains why Defraggler takes a long time to complete its routine using the defrag button. It's doing a defragment and optimize routine more complex than just free space consolidation. I now know this because Defragglers equivalent to free space consolidation is called Defragmenting freespace. My new routine will be... Analyze then defrag from the file list (check all) then Defragment Freespace in Normal Mode (weekly) Badabing! Badaboom!