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Sandisk

WD_BLACK SN850X 4TB NVMe SSD - M.2 2280, Up to 7,300 MB/s Read speeds, Up to 6,300 MB/s write speeds, Gaming Expansion, High Performance Internal Solid State Drive - WDS400T2X0E

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Availability: Only 1 left in stock, order soon!
Fulfilled by electrolert
Arrives Saturday, Mar 14
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Capacity: 4TB


Style: SN850X


Features

  • TRANFORM YOUR PC: Insane speeds up to 7,300MB/s (1TB - 4TB models) deliver top-tier performance with ridiculously short load times for your gaming PC or workstation for the elite experience youve been waiting for.
  • MORE ROOM FOR MORE GAMES: Capacities up to 8TB built with SANDISK TLC 3D NAND, means you get to keep more games at the ready and get into the action even faster.
  • HEATSINK FOR THE WIN: The WD_BLACK SN850X NVMe SSD 1TB and 2TB drives have an optional heatsink version that not only looks awesome but also helps your rig maintain peak performance through the most intense gaming sessions.
  • DO MORE WITH WD_BLACK DASHBOARD: The downloadable WD_BLACK Dashboard (Windows only) monitors your drives health, lets you customize your RGB lighting, and, exclusively on the SN850X SSD, enables Game Mode 2.0 to transform your gaming experience.
  • FUTURE FORWARD FREATURES: The WD_BLACK SN850X SSD boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management (ATM).
  • POWERED BY SANDISK: The WD_BLACK, WD Blue, and WD Green flash products are manufactured by Sandisk Technologies, Inc. or its affiliates and distributed under license from Western Digital Corporation.

Description

Crush load times and slash throttling, lagging, and texture pop-ins with the WD_BLACK SN850X NVMe SSD. Available in capacities of 1TB up to 8TB, this gaming drive is built for top-tier performance. With 7,300MB/s speeds (1TB - 4TB models) and a heatsink option to maintain performance, you can enjoy your favorite games without worrying about lag. Plus, the downloadable SANDISK Dashboard (Windows only) can automatically turn on Game Mode 2.0 features. The WD_BLACK SN850X NVMe SSD delivers a smooth, fast experience —and the innovations that let you compete at your absolute peak. POWERED BY SANDISK

Digital Storage Capacity: 4000 GB


Hard Disk Interface: PCIE x 4


Connectivity Technology: NVMe


Brand: Sandisk


Special Feature: WD_BLACK Dashboard


Hard Disk Form Factor: 2.5 Inches


Hard Disk Description: Solid State Drive


Compatible Devices: Laptop, Motherboards


Installation Type: Solid State Drive


Color: Black


Hard Drive: ‎4000 GB Solid State Drive


Brand: ‎Sandisk


Series: ‎WD_BLACK SN850X NVMe SSD


Item model number: ‎WDS400T2X0E


Hardware Platform: ‎PC


Item Weight: ‎0.264 ounces


Product Dimensions: ‎3.15 x 0.87 x 0.09 inches


Item Dimensions LxWxH: ‎3.15 x 0.87 x 0.09 inches


Color: ‎Black


Flash Memory Size: ‎4 TB


Hard Drive Interface: ‎PCIE x 4


Voltage: ‎1 Volts


Batteries: ‎1 Lithium Ion batteries required.


Manufacturer: ‎Sandisk Technologies, Inc.


Language: ‎Spanish


Date First Available: ‎August 3, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Blazing Fast & Reliable – Perfect for Gaming and Heavy Workload
Capacity: 2TB Style: SN850X w/ Heatsink
Review Image by Kayla Mom Kayla Mom
Upgraded to the WD_BLACK 2TB SN850X NVMe from a Gen 3 SSD, and the difference is massive. This drive delivers exactly what it promises — insane speeds, great thermal performance, and rock-solid reliability. Speed & Performance: Right out of the box, I was getting read/write speeds over 7,000 MB/s, matching advertised specs. Game load times are almost instant, and large file transfers (like 4K video or game installs) finish in seconds. Perfect for my gaming rig and content creation workflow. Gaming Benefits: Games launch faster, textures stream without stutter, and overall system responsiveness is noticeably smoother. If you’re using Windows 11 with DirectStorage support, this drive is built to take advantage of it. Thermals: I bought the version with the heatsink, and it’s doing a great job keeping temps in check. Even under sustained load, it stays cool and doesn’t throttle. If you’re using this in a cramped case or PS5, definitely get the heatsink version. Installation: Easy to install in my ATX motherboard. Plug it in, screw it down, format in Disk Management, and you’re good to go. Final Thoughts: ✅ Fast, future-proof PCIe Gen 4 performance ✅ Great for gaming, productivity, and OS drive ✅ Reliable WD quality ✅ Excellent price-to-performance ratio If you’re looking for a top-tier Gen 4 NVMe SSD, the SN850X is an absolute no-brainer. Would buy again in a heartbeat. ... show more
Reviewed in the United States on September 22, 2025 by Kayla Mom Kayla Mom
    • Great quality and reliability
Capacity: 4TB Style: SN850X
Great quality and reliable functionality that you'd expect from Western Digital. The capacity is amazing, it has blazing fast read/write speeds, and installation was a breeze as it fits a standard M.2 socket. I was able to immediately initialize and partition it for use after installing it. This went into my laptop, so it obviously changed nothing externally and added only a few grams to the weight. It's pricey, but I'd rather get a good one from a brand I trust than just go with the cheapest option available. ... show more
Reviewed in the United States on January 4, 2026 by MattB
    • Blazing Fast Performance
Capacity: 2TB Style: SN850X w/ Heatsink
This SSD with Heatsink has been an absolutely massive upgrade over my previous SSD. Installation was quick and straightforward, and the performance difference was immediately noticeable. Boot times are faster, games and applications load almost instantly, and overall system responsiveness is on a whole new level. I really love the built in heatsink. It looks great, fits perfectly, and does an excellent job keeping temperatures under control even during heavy use. It’s nice not having to worry about thermal throttling or buying a separate cooling solution. The only downside is that it didn’t come with a mounting screw to secure it to the motherboard. It’s a small thing, but worth noting, thankfully most motherboards include one. Overall, this is a top tier SSD that delivers incredible speed, great thermals, and premium build quality. Highly recommended for anyone looking to seriously upgrade their system. ... show more
Reviewed in the United States on December 28, 2025 by Amazon Customer
    • Blazing Fast Performance and Excellent Reliability
Capacity: 1TB Style: SN850X
The WD_BLACK SN850X 1TB NVMe SSD delivers outstanding speed and performance. Boot times are noticeably faster, games and applications load almost instantly, and overall system responsiveness feels dramatically improved. Installation was simple, and the drive runs reliably even under heavy workloads. It’s a fantastic upgrade for gaming rigs or productivity setups and offers excellent value for such high-end performance. ... show more
Reviewed in the United States on January 12, 2026 by Pedro Guimaraes
    • Very fast and reliable—big speed boost, still perfect
Capacity: 4TB Style: SN850X
Fast, reliable NVMe drive. Installation was straightforward and it immediately delivered a noticeable speed boost—boot times, large file transfers, and app/game loads are all much quicker. It runs stable with no errors or dropouts, and the 4TB capacity is perfect for keeping everything in one place. Still in perfect condition and working exactly as expected. ... show more
Reviewed in the United States on January 25, 2026 by Angel Esteva
    • Perfect upgrade! works flawlessly, fast and without issues.
Capacity: 8TB Style: SN850X
I bought this 8TB drive during black friday 2024 over a year ago for $535 and im so glad i did, it still works perfectly on my gaming laptop where i got almost my whole STEAM library of games installed on it. today Jan 11 2026 with the shortage of Ram and NAND chips this same Drive is listed at $899. this thing is perfect and for a PCIe Gen4 NVME drive this is the best available 8TB Drive. there are others like the Samsung SSD 9100 PRO but that is PCIe Gen5 it is backwards compatible with GEN4 but you are praying a premium for performance you cant use if your motherboard/Device cant use GEN5. ... show more
Reviewed in the United States on January 11, 2026 by SDE Bellisarius
    • Extreme speed and reliable performance for gaming
Capacity: 1TB Style: SN850X
The 1TB WD_BLACK SN850X was one of the best upgrades I made to my PC. Installation in M.2 format was quick and easy, and I noticed the difference from the very first boot: game loading times were drastically reduced, and the system responded with impressive smoothness. Speeds of up to 7,300 MB/s are truly noticeable in every large file transfer. Furthermore, the compact and elegant design fits perfectly in my system. Without a doubt, this is an SSD designed for gamers seeking power and stability. ... show more
Reviewed in the United States on November 25, 2025 by Jonathan Céspedes
    • works well
Capacity: 2TB Style: SN850X w/ Heatsink
runs fast.
Reviewed in the United States on January 22, 2026 by RTH

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