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A thin green circuit board with black chips labeled SanDisk 4TB NVMe

SanDisk

SanDisk WDS400T5B0E-00CPE0 4TB internal SSD

SKU CH-Y7WS-2ECM0 MPN WDS400T5B0E-00CPE0

A 4 TB internal SSD using PCIe 4.0 for sequential reads up to 6900 MB/s and writes up to 6700 MB/s

  • Total capacity4 TB
  • Sequential read speedUp to 6,900 MB/s
  • Sequential write speedUp to 6,700 MB/s
  • Interface typePCI-Express 4.0 x4
  • Form factorM.2 2280
  • Product typeInternal Solid State Drive (SSD)
  • Up to 6900 MB/s read speed accelerates project loading
  • 6700 MB/s write speed copies large files quickly
  • 1200 TBW rating supports heavy daily workloads
  • 75 million hours MTTF indicates long-term reliability
  • 1500G shock resistance protects data during transport

SanDisk 4TB NVMe SSD for AI workflows

This SanDisk 4TB internal SSD uses PCIe 4.0 x4 and NVMe to deliver sequential reads up to 6900 MBps and writes up to 6700 MBps, with 4KB random reads of 900000 IOPS and writes of 1100000 IOPS. It targets creators and professionals who need large capacity and fast asset loading for AI-enabled projects.

M.2 2280 DRAM-less design with HMB and encryption

The drive fits a standard M.2 2280 slot and operates without a dedicated DRAM cache by using Host Memory Buffer technology. It supports TCG Pyrite 2.01 encryption and ATA security passthrough over NVMe, and is rated for 1200 TBW with an MTTF of 1.75 million hours across an operating range of 0°C to 85°C.

Upgrade from older NVMe when capacity

Moving from an earlier PCIe generation NVMe drive to this 4TB model adds both the higher Gen 4.0 bandwidth and the QLC 3D CBA NAND capacity in a single M.2 2280 module. The jump is worth it when project files exceed current drive space and workflows benefit from sustained sequential speeds up to 6900 MBps.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $407.99
Pricier than about 76% of the 1,994 comparable items (median $180.49).
Total capacity 4 TB
Higher than about 90% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 6,900 MB/s
Higher than about 79% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $102.00 per TB
Cheaper than about 84% of the 1,362 comparable items (median $165.50 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameWestern Digital
Model nameWDS400T5B0E-00CPE0
Total capacity4 TB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 6,900 MB/s
Sequential write speedUp to 6,700 MB/s
Random read (4K)Up to 900,000 IOPS
Random write (4K)Up to 1,100,000 IOPS
Storage
NAND flash typeQLC 3D CBA NAND
Cache memoryNo DRAM (HMB)
Data encryptionTCG Pyrite 2.01, ATA security passthrough over NVMe
Write endurance1200 TB
Connectivity
Connection protocolNVMe
Ports & slots
Interface typePCI-Express 4.0 x4
Size & build
Form factorM.2 2280
Overall height2.38 mm
Overall width22 mm
Product depth80 mm
Product weight5.7g
Shipping weight0.05 kg
Package size127 × 102 × 19 mm
Environment & compliance
Operating temperature range32 °F to 185 °F (0 °C to 85 °C)
Storage temperature range-40 °F to 185 °F (-40 °C to 85 °C)
Max shock tolerance1,500G @ 0.5 ms half sine
Vibration toleranceOperating Vibration: 5 gRMS, 10-2000 Hz, 3 axes
Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes
More details
Mean time to failure1.75 Million hours

Questions about this item

What practical throughput ceiling does the PCIe 4.0 x4 interface impose on this drive?

The PCIe 4.0 x4 link caps real-world sequential transfers at roughly 7 000 MB/s, so the drive's 6 900 MB/s read and 6 700 MB/s write ratings sit right at that ceiling.

What physical slot and clearance does the M.2 2280 form factor require?

It needs an M-keyed M.2 slot that accepts 2280-length modules; the board must provide at least 80 mm of clear space from the mounting screw to the slot's end.

How is the drive installed, and which step is most often missed?

Insert the module at an angle, press it flat, and secure it with the single M2 screw; the step most people skip is enabling the NVMe controller in the BIOS so the OS can see the drive.

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