WD_BLACK SN850X WDS400T2XHE - SSD - encrypted - 4 TB - internal - M.2 2280 - PCIe 4.0 x4 (NVMe) - TCG Opal Encryption 2.

Get the Ultimate Gaming Edge

Insane speeds up to 7,300 MB/s(1) (1TB-4TB models) deliver top-tier performance with ridiculously short load times for the elite gaming experience you’ve been waiting for. More Room for More Games

Capacities up to 8TB(2) built with Western Digital TLC 3D NAND, means you get to keep more games at the ready — and get into the action even faster.

DirectStorage Supported

Improve load times and get precious time back with Microsoft DirectStoragetechnology.

Do more w/ WD_BLACK Dashboard

The downloadable WD_BLACK Dashboard (Windows only) monitors your drive’s health, and lets you customize your RGB lighting.

Future-forward Features

The WD_BLACK SN850X SSD boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management(4). Compare SSDs WD_BLACK SN850X NVMe SSD Add To Basket WD_BLACK SN770 NVMe SSD Buying Options WD Blue SN580 NVMe SSD Add To Basket WD Blue SN5000 NVMe SSD Add To Basket Customer Reviews 4.8 out of 5 stars 31,649 4.7 out of 5 stars 25,264 4.7 out of 5 stars 6,088 4.6 out of 5 stars 2,331 Price £462.67£462.67 — £218.58£218.58 £414.84£414.84 Capacities(3) 1TB – 8TB 250GB – 2TB 250GB – 2TB 500GB – 2TB Interface(2) PCIe Gen4x4 PCIe Gen4x4 PCIe Gen4x4 PCIe Gen 4 Sequential Read (MB/s)(1) Up to 7,300 (1TB - 4TB models) Up to 5,150 Up to 4,150 Up to 5,500 Sequential Write (MB/s)(1) Up to 6,600 Up to 4,850 Up to 4,150 Up to 5,000 Great for Gaming Gaming Content Creation Content Creation (1) Based on read speed. 1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors.

(2) 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.​

(3) PCIe Gen4 storage technology requires a compatible motherboard. WD_BLACK SN850X is backwards-compatible with PCIe Gen3.​

(4) Requires the downloadable WD_BLACK Dashboard (Windows only)​

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