The Western Digital WD Blue SN5100 4TB is a PCIe 4.0 NVMe M.2 2280 SSD designed for high-speed bulk storage. It delivers sequential read speeds of 6,900 MB/s and write speeds of 6,700 MB/s to accelerate large file transfers. Built with SanDisk QLC 3D NAND and the WD Polaris 3 controller, it leverages Host Memory Buffer technology to hit 1,100,000 IOPS random write performance without a dedicated DRAM cache. This drive provides gamers and creators with a vast, responsive archive for growing media libraries.