first of I think you made a mistake ; its not q&q defrag , but O&O , furthermore raxco perfect disk is a rebrand of o&o pro defrag. currently I am borderlining between puran defrag and iobit pro ( which is actually not that good ). since I have rollback RX pro installed , I do not have to defrag , it's not recommended when having rbrx installed : this program defrags the snapshots by it's own defrag