[Hard Drive becoming more fragmented]

It's an HDD.  In running my multiple defrags, I found it was the index files that were causing the biggest issue.  The page files are large, but I wouldn't expect them to be defragged.  The index file kept getting larger and larger.  So I rebuilt the index, it reset at a much smaller size and now I'm running 2-4% fragmentation.  Much better!

[Hard Drive becoming more fragmented]

After purchase, when first running Defraggler, my drive was about 4% fragmented.  I run Defraggler once or twice each day.  Now a little over a month later, I'm can't get less than 15% fragmented.  Typically there are 10 to 15 files causing the fragmentation.  However, if I defragment them individually, I can still only get to 15%.  Why does the fragmented portion keep increasing and what can I do to make it go the other direction?  My disc is a Samsung SAMSUNG MZ7PA128HMCD-010H1