The Samsung 850 Pro 6Gbps SSD is the first SSD in the world to use 3D V-NAND. Samsung's confidence in the 850 is evident with their 10 year warranty, speaking directly to product quality and endurance. Samsung went much further though and, before approving this memory for the retail market, mass-produced and incorporated it within data centers. By changing from a planar structure, Samsung built a 32-layer cylindrical cell structure, stacking more cells vertically and resulting in a smaller footprint and higher density. Having said this, the maximum capacity of the 850 Pro remains to be 1TB.