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Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4 — main product image
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4
Western Digital

Western Digital WDS400T4B0E 4TB Blue SN5000 NVMe SSD Gen4

PCIe Gen 4

PCIe Gen 4 at 5,500MB/s read with 4TB capacity and 1,200TBW endurance — the SN5000 closes the gap between creative workstation storage and high-end prosumer drives.

$449.99*$464.80Save 3%
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*Price sourced from Amazon.com. Last updated:Aug 29, 2026.Price and availability are subject to change — details.

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Overview

The Western Digital WD Blue SN5000 WDS400T4B0E is a 4TB PCIe Gen 4 x4 NVMe SSD in M.2 2280 form factor, rated at 5,500MB/s sequential read and 1,200TBW write endurance. Those numbers deserve interpretation: 5,500MB/s means a 50GB 4K video project file transfers from this drive to another Gen 4 storage device in under 10 seconds. The 1,200TBW rating at 4TB capacity translates to a 0.30 DWPD (Drive Writes Per Day) over a 5-year warranty period — sufficient for the heaviest creative workflows. The nCache 4.0 SLC caching layer ensures that the rated write speeds are what you'll see during typical large-file operations, not theoretical numbers that collapse the moment you push beyond a small buffer. The NAND is TLC (Triple-Level Cell), the industry standard for capacity-tier consumer and prosumer drives, balancing cost-per-gigabyte with adequate endurance.

The SN5000 4TB is engineered for content creators who have outgrown smaller NVMe drives and need a single-slot solution for active project storage. A videographer managing a 4K or 6K project library, a 3D artist working with large scene caches, or a photographer ingesting RAW files from multi-card shoots will find the combination of 4TB capacity and Gen 4 throughput eliminates two common workflow bottlenecks simultaneously: storage space anxiety and asset load times. The drive sits clearly above the budget QLC tier — where sustained write performance degrades significantly under load — without requiring a premium investment in enterprise or enthusiast-grade TLC alternatives. It's not a RAID replacement or an archival solution; it's a primary active-project drive for creative workstations where the M.2 slot is the right form factor.

Key Features

Hold more masterpieces and enjoy inspiration with up to 4TB(1) capacity.

Harness AI and streamline your workflow with the combined power of PCIe Gen 4, up to 5,500MB/s(2) read speeds (4TB(1) model), and Western Digital nCache 4.0 Technology.

Switch smoothly between applications and projects with high-end NVMe storage technology.

Create confidently with up to 1,200TBW(3) (4TB(1) model) endurance for every step of your flow.

Download Acronis True Image for Western Digital data migration software to transfer your files(4).

Specifications

Capacity
4TB
Interface
PCIe Gen 4
Read Speed (4TB model)
Up to 5,500MB/s
Endurance (4TB model)
Up to 1,200TBW
Technology
Western Digital nCache 4.0
Included Software
Acronis True Image for Western Digital

Frequently Asked Questions

The SN5000 runs on PCIe Gen 4 x4, which delivers up to 5,500MB/s sequential read on the 4TB model. If installed in a PCIe Gen 3 slot, the drive will operate at Gen 3 speeds — roughly 3,500MB/s sequential read — because PCIe is backward compatible. You won't damage the drive, but you'll leave significant bandwidth on the table. For full performance, a Gen 4-capable platform (AMD Ryzen 3000+, Intel 11th Gen+, or newer) is required.
TBW (Terabytes Written) is the manufacturer's rated write endurance before wear may affect reliability. At 1,200TBW, if you wrote 200GB per day every day, the drive would reach its rated endurance ceiling in approximately 16 years. For content creators writing large video files daily, even aggressive workflows rarely exceed 50–100GB/day, making the 1,200TBW rating effectively lifetime endurance for most users.
nCache 4.0 is WD's SLC (Single-Level Cell) write caching technology. It buffers incoming writes in fast SLC-mode NAND before writing them to the denser TLC cells. This means burst write speeds are high, but if you sustain a very large sequential write — larger than the SLC cache — speeds will drop to the native TLC write rate. On a 4TB drive the SLC cache is proportionally large, so most creative workloads (even large 4K project exports) will complete within the cached window.
Yes, the SN5000 uses the standard M.2 2280 form factor (22mm wide, 80mm long), which is compatible with the M.2 slot on virtually all modern desktop motherboards, laptop upgrade bays, and PCIe adapter cards.
The SN5000 includes built-in thermal management that will throttle performance if the controller exceeds safe operating temperatures. In an open desktop with airflow, the drive typically sustains rated speeds without an add-on heatsink. In thermally constrained laptop bays or tightly packed mini-ITX builds, a low-profile M.2 heatsink is advisable to maintain consistent peak performance during long sustained transfers.

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