I don't have defragment set as an auto function as I like to have some control ...hehe
I rather have some things on my computer happen when I wan't it to be done.
Defragment is one of them.
I probably do it once every now and then; but what a joy it is after doing it
I defragment my external drives and files/photo's/ etc show up so much faster than before.
Defragment my C: drive and my system runs smoother.
What a great boost De-Frag can do to computer experience