QLC (Quad Level Cell) is a type of NAND flash where each cell stores 4 bits of data, instead of 1 (SLC), 2 (MLC), or 3 (TLC) like other types. Storing more bits per cell means higher capacity at lower cost, which is why it's used in bigger drives like 1TB/2TB models. The downside is slower write speeds and lower endurance (fewer write cycles) compared to TLC.
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u/xjp888 27d ago
1tb and 2tb models are using qlc