For the first time, Samsung has starting producing SSDs using (wait for it) 3-bit multi-level-cell, 3D Vertical NAND flash memory, better known as TLC V-NAND. So, who in the actual hell cares? You might, if you’re planning on buying an SSD or computer soon. Samsung’s current V-NAND technology has resulted in models like the 850 Pro SSD, which topped all benchmarks and has a 10-year guarantee.
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https://www.engadget.com/2014/10/09/samsung-tlc-v-nand-ssd/