For reasons uknown, I haven't really dealt with defragging my drives in ...many years. Anyway, I just decided to run it for one of my external drives. I got this window, part of it I am showing. I was surprised to see it says it runs automatically on my C and D drives, both of which are ssds. I am pretty sure I never enabled that. Does Windows 8.1 actually defrag the SSDs? Or does it perform some other type of optimization?