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WD_BLACK

WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E

  • Based on 29,188 reviews
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Availability: In Stock.
Fulfilled by CyberSell
Arrives Nov 6 – Nov 7
Order within 6 hours and 23 minutes
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Capacity: 4TB


Style: SSD


Features

  • TRANSFORM YOUR PC. Get top-tier performance and ridiculously short load times for your gaming PC or workstation with insane speeds up to 7,300 MB/s (2)
  • MORE ROOM, MORE GAMES. Capacities up to 8TB (1) built with Western Digital TLC 3D NAND, means you get to download more games and stop deleting your favorites.
  • HEATSINK FOR THE WIN. All capacities have an optional heatsink version to help maintain peak performance through your most intense gaming sessions.
  • DO MORE WITH DASHBOARD. The downloadable WD_BLACK Dashboard (Windows only) monitors your drives health, lets you customize your RGB lighting (heatsink versions only), and can automatically detect games to turn on Game Mode 2.0.
  • FUTURE-FORWARD FEATURES. The WD_BLACK SN850X boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management (ATM).

Description

Strap in for breakneck gaming speeds with the WD_BLACK SN850X NVMe™ SSD. Crush load times and slash throttling, lagging, and texture pop-ins for a smooth, fast experience that lets you compete at your absolute peak. This purpose- built gaming drive comes in capacities of 1TB to 4TB(2), with an optional heatsink on the 1TB and 2TB drives to help sustain top-end performance for more consistent gameplay. With the advanced features of Game Mode 2.0 (Windows only) automatically turned on by the WD_BLACK Dashboard and supporting Microsoft's DirectStorage technology, the WD_BLACK SN850X NVMe SSD delivers top-tier performance to keep you playing, streaming, recording, and dominating the game. (2) 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.

Digital Storage Capacity: 4000 GB


Hard Disk Interface: Solid State


Connectivity Technology: NVMe


Brand: WD_BLACK


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: ‎WD_BLACK


Series: ‎SN850X


Item model number: ‎WDS400T2X0E


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: ‎Solid State


Voltage: ‎1 Volts


Batteries: ‎1 Lithium Ion batteries required.


Manufacturer: ‎Western Digital 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: Nov 6 – Nov 7

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Blazing Fast & Reliable – Perfect for Gaming and Heavy Workload
Capacity: 2TB Style: SSD 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 Product, Works Fast!
Capacity: 2TB Style: SSD w/ Heatsink
Easy Install! Fast Drive and formats / works as expected. There is a little orange light that pulsates just to let you know that the device is working. This unit does NOT come with a screw or a mother board base to mount it to , so ensure that you have one from the MOBO Vendor or buy one separately. Size is as expected and I have not seen any noise or issues. Connected to the MoBo easily as well. Got it during Prime Days so I would say great value for the 2TB. ... show more
Reviewed in the United States on July 25, 2025 by DaChinaMan
    • Fast and Reliable Gaming SSD
Capacity: 2TB Style: SSD w/ Heatsink
This Fast and Reliable Gaming SSD my first WD SSD and I'm impressed. The WD 850X is fast and reliable for gaming, with quick load times and stable temperatures. Easy to install. Highly recommended for gamers.
Reviewed in the United States on September 4, 2025 by sevenmne
    • 4 Years, it's still a Plug-and-Play Perfection for PS5
Capacity: 1TB Style: SSD w/ Heatsink
Quick Important Information: I bought this back in 2023 at a reasonable price of $85 As an average WD_BLACK user, I’ve come to expect reliable performance from their products, and this SN850 SSD lives up to the brand’s reputation. Installation & Setup: Super easy to install, literally plug-and-play. If you're using this with a PS5, the process is smooth and quick. Once installed, the console recognized it right away and formatted it without a hitch. No extra steps or tinkering needed. Performance Is Top-Notch: The SN850 runs like it is the PS5’s internal SSD. Game load times are identical, whether I’m playing directly off this drive or the built-in one. I’ve tested it with some larger titles and fast-paced games, and it handles everything effortlessly. Transferring games back and forth is quick, and performance remains stable even during longer sessions. The integrated heatsink does its job well, with no signs of overheating or thermal throttling. Built for Gaming: What I love about WD_BLACK is that their products are made with gamers in mind. This SSD isn’t just fast, it’s reliable, built well, and designed to meet modern gaming demands. I’ve used several of their drives over the years for both console and PC, and they’ve never let me down. This SSD is no exception. Final Thoughts: If you’re a PS5 owner looking for an easy storage upgrade that won’t compromise speed or performance, this is a perfect choice. It’s simple to install, works flawlessly with the system, and gives you the extra space you need to enjoy your full game library without constantly juggling files. WD_BLACK has once again delivered a product that hits all the marks—fast, dependable, and user-friendly. ... show more
Reviewed in the United States on May 9, 2025 by Taleful
    • Works amazing, easy installation
Capacity: 1TB Style: SSD w/ Heatsink
Easy installation, now my ps5 has more storage!!! Super happy with this, don’t be afraid to install, it’s literally the easiest thing just use YouTube! Now I buy a lot off amazon but what I can tell you is this is the best product for your buck! Not to mention it’s licensed!
Reviewed in the United States on September 6, 2025 by Jayden Evora
    • Definitely a Solid SSD
Capacity: 2TB Style: SSD w/ Heatsink
Easy to Install, Fast, and Reliable. The SN850X is just a great all-around drive, I've been using it as my OS and Primary Gaming Drive for several months at this point, and it's been awesome. My PC boots up in seconds, a great improvement from my old OS drive. Pair that with solid temperature control and large storage capacity, and you've got this absolutely solid drive. I have no complaints about this SSD; I totally recommend it. (Especially for Gaming) ... show more
Reviewed in the United States on October 13, 2025 by Aiden Murphy
    • good hard drive
Capacity: 2TB Style: SSD
Review Image by Bernardo Garcia Bernardo Garcia
Excellent hard drive, it works perfectly and offers good transfer speeds. I recommend it if you want your computer to run at a good speed. In my experience, it's a good hard drive. Thanks!
Reviewed in the United States on October 11, 2025 by Bernardo Garcia Bernardo Garcia

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