Samsung’s innovative 3D V-NAND flash memory architecture breaks through density, performance, and endurance limitations of today’s conventional planar NAND architecture. Samsung 3D V-NAND stacks 32 cell layers vertically resulting in higher density and better performance utilizing a smaller footprint. The 850 EVO’s Dynamic Thermal Guard constantly monitors and maintains ideal temperatures for the drive to operate in optimal conditions to ensure the integrity of your data. The Thermal Guard automatically throttles temperatures down when temperatures rise above optimal critical threshold. This protects your data while maintaining responsiveness to help ensure your computer is always safe from overheating. So buy this Hard Drive and Save $90 Off on a Samsung 850 EVO 250GB 2.5" SATA III Internal SSD for $89.99 after promo code SAMSUNG40 with free shipping at Rakuten.com.