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Most every expert advises against defragging an SSD because it will reduce life span. Does your SSD support TRIM to optimize ?
This is the best article that I could quickly find as to how Windows is handling the SSD in your screenshot (will perform a TRIM only if 10% or more of drive is fragmented) and what is advised. Good Luck.
Why Windows 8 and 8.1 defragment your SSD and how you can avoid this