Western Digital WDS400T4B0E-00BKY0

Overview

The Western Digital WDS400T4B0E-00BKY0 is a 4TB internal solid-state drive designed for high-performance storage in systems with an M.2 2280 slot and PCIe Gen 4 interface. It delivers impressive speeds of up to 5,500 MB/s for sequential reads and up to 5,000 MB/s for sequential writes, making it well suited for demanding tasks like gaming, 4K video editing, AI model training, and managing large media libraries. With high random read and write IOPS, it maintains responsiveness even under heavy workloads.

Key features

• nCache 4.0 technology reserves flash memory as a high-speed cache to keep write speeds steady during sustained transfers and multitasking.
• High endurance rating of 1,200 TBW supports frequent data writes, making it reliable for scratch files, virtual machines, and ongoing project revisions.
• Five-year limited warranty provides long-term confidence in durability and performance.
• Includes Acronis True Image software to simplify data migration from existing drives, avoiding the need to reinstall operating systems or applications.
• Compact M.2 2280 form factor fits easily into desktops, small workstations, and performance laptops.
• PCIe Gen 4 x4 NVMe interface unlocks the full potential of compatible systems for faster data access and transfer.

Key specs

• Capacity: 4 TB
• Form factor: M.2 2280
• Interface: PCIe Gen 4 x4 NVMe
• Sequential read speed: up to 5,500 MB/s
• Sequential write speed: up to 5,000 MB/s
• Random read IOPS: up to 690,000
• Random write IOPS: up to 900,000
• Endurance: 1,200 TBW
• Warranty: five-year limited

Installation and setup

Installing this SSD is straightforward: simply slide it into an available M.2 2280 slot on your desktop motherboard, workstation, or laptop and secure it with a single screw. The included Acronis True Image software streamlines the process of transferring your existing data, allowing you to upgrade your storage without reinstalling your operating system or applications.

Ideal uses and environments

This drive is a strong choice for creative professionals, software developers, and gamers who need large, fast storage to keep up with intensive workloads. It fits well in environments where sustained high-speed data access is critical, such as video editing suites, AI research labs, and high-end gaming rigs. Its combination of capacity and PCIe Gen 4 performance makes it suitable for users who want to avoid storage bottlenecks and maintain system responsiveness during demanding tasks.

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.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, 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. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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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.

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