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Rectangular 2.5 inch SATA SSD with black label and silver metal casing

Western Digital

Western Digital Blue 4TB 2.5" SATA internal SSD WDS400T2B0A

SKU CH-TGZ7-32Z6E MPN WDS400T2B0A

A 2.5 inch SATA internal SSD storing 4TB with sequential reads up to 560 MBps, writes up to 530 MBps, 600 TBW endurance and 1.75M hours MTTF

  • Total capacity4 TB
  • Sequential read speedUp to 560 MB/s
  • Sequential write speedUp to 530 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)

Model 4TB

  • 4TB capacity stores large game libraries and media collections
  • 3D NAND technology enables sequential read speeds up to 560 MB/s
  • Sequential write speeds up to 530 MB/s accelerate file transfers and application loads
  • 75M hours MTTF and 600 TBW rating support long-term data integrity
  • WD F.I.T. Lab certification verifies compatibility across desktops and laptops

Western Digital Blue 4TB 2.5" SATA SSD

The Western Digital Blue WDS400T2B0A is a 4TB internal solid state drive built in a 2.5-inch form factor. It uses 3D NAND technology and a SATA III interface to deliver sequential read speeds up to 560 MBps and sequential write speeds up to 530 MBps. The drive is rated for 600 TBW and an MTTF of 1.75M hours.

Suits laptops and desktops needing high-capacity

This drive fits any system with a 2.5-inch SATA bay, making it a direct upgrade for older laptops or desktops that lack PCIe slots. The low active power draw of 60 mW average and slumber power of 56 mW helps extend battery life in portable machines. Users who need the higher throughput of a PCIe interface should consider a different drive.

600 TBW endurance rating defines the write lifespan

The 600 terabytes written specification tells you how much data can be written to the drive over its warranty period. Combined with the 1.75M hour MTTF and 3D NAND construction, this figure lets you judge whether the drive meets the durability needs of your workload.

How it compares

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

Price $275.99
Pricier than about 65% 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 560 MB/s
Lower than about 60% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $69.00 per TB
Cheaper than about 94% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameWestern Digital
Product lineBlue
Model nameWDS400T2B0A
Total capacity4 TB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 560 MB/s
Sequential write speedUp to 530 MB/s
Random read (4K)Up to 95,000 IOPS
Random write (4K)Up to 82,000 IOPS
Storage
NAND flash type3D NAND
Write endurance600 TB
Ports & slots
Interface typeSATA III
Power
Idle power drawSlumber (mW): 56
DEVSLP (mW): 5-12
Active power drawAverage Active Power (mW): 60
Max Read Operating (mW): 3000
Max Write Operating (mW): 3800
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width69.85 mm
Product depth100.2 mm
Product weight57.9g
Shipping weight0.09 kg
Package size137 × 102 × 20 mm
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-55 °C to 85 °C
Max shock tolerance1,500G @ 0.5 msec half sine
Vibration toleranceOperating: 5.0 gRMS, 10-2000 Hz
Non-operating: 4.9 gRMS, 7-800 Hz
More details
Mean time to failureUp to 1.75M hours

Other versions of this model

5 more in the same range

Questions about this item

What SATA interface must my laptop or desktop have for the 2.5" WDS400T2B0A to connect?

The drive uses a standard SATA III interface, so any system with a 2.5" SATA data and power connector will accept it.

Will the 4TB Blue SSD work reliably in an older SATA II port?

Yes, the SATA III interface is backward compatible with SATA II ports, though sequential speeds will be limited to the older port's maximum.

How can I verify the drive is healthy after installation?

Download the free WD Dashboard software to monitor SMART attributes, remaining life based on the 600 TBW rating, and current operating temperature.

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