Western Digital WDS400T2X0E-00BCA0

Overview

The Western Digital WDS400T2X0E-00BCA0 is a 4TB internal solid-state drive designed to deliver fast and reliable storage for demanding applications. It fits into the M.2 2280 slot and connects via a PCIe Gen4 x4 interface, allowing it to reach sequential read speeds up to 7,300MB/s and write speeds up to 6,600MB/s. This drive is well suited to gamers, creative professionals, and power users who require quick access to large files and smooth multitasking performance.

Built with TLC 3D NAND flash, the SSD balances speed and endurance, supporting advanced features like Microsoft DirectStorage and Game Mode 2.0 to optimize gaming load times and responsiveness. Its adaptive thermal management helps maintain performance during extended use, making it a strong choice for high-performance desktops and workstations.

Key features

• PCIe Gen4 x4 NVMe interface enables rapid data transfer for faster load times and file access
• Game Mode 2.0 and Microsoft DirectStorage support reduce latency and improve gaming responsiveness on Windows systems
• Adaptive Thermal Management prevents overheating to sustain high performance during intensive workloads
• Predictive Loading technology anticipates data needs to speed up application and game launches
• Large 4TB capacity provides ample space for extensive game libraries, video projects, and data sets
• Durable TLC 3D NAND flash ensures a balance of speed and long-term reliability
• 5-year limited warranty offers confidence in the drive’s longevity and quality

Key specs

• Storage capacity: 4TB
• Form factor: M.2 2280
• Interface: PCIe Gen4 x4 NVMe
• Sequential read speed: up to 7,300MB/s
• Sequential write speed: up to 6,600MB/s
• Random read IOPS: up to 1,200K
• Random write IOPS: up to 1,100K
• Endurance: 2,400 terabytes written

Connectivity and compatibility

This SSD fits into any compatible M.2 2280 slot supporting PCIe Gen4 x4 NVMe, making it suitable for modern desktops and high-end laptops that support this interface. It is optimized for Windows systems to take full advantage of features like Microsoft DirectStorage and Game Mode 2.0, enhancing gaming and professional workflows.

Ideal uses and environments

The Western Digital BLACK SN850X 4TB is a strong choice for users who demand fast storage with large capacity. It works well in gaming setups where reducing load times is critical, as well as in creative environments handling large video or design files. Its endurance and thermal management also make it reliable for extended heavy workloads in professional workstations.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more