When we reviewed Samsung's 860 EVO SSD a few months ago, we spent some time musing about the coming quad-level-cell flood. Well, folks, the fourth bit of the levelocalypse is finally upon us. Samsung's QLC-powered 860 QVO SSD has made its way into the TR labs.The 860 QVO is the third consumer QLC SSD to hit the consumer market. The first was Intel's 660P , followed by its Micron-flavored cousin, the Crucial P1 .