Samsung 850 evo 2tb ssd 3d v nand technology and the samsung ssd 850 evo samsungrsquos unique and innovative 3d v nand flash memory architecture is a breakthrough in overcoming the density limitations performance and endurance of todayrsquos conventional planar nand architecture 3d vnand is fabricated by stacking 32 cell layers vertically over one another rather than decreasing the cells dimensions and trying to fit itself onto a fixed horizontal space resulting in higher density a