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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

  • Device TypeInternal Solid State Drive (SSD)
  • Used ForConsumer
  • Form Factor2.5"
  • Capacity4TB
  • Memory Components3D NAND
  • InterfaceSATA III

Options 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.

Highlights

  • 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

Specifications

BrandWestern Digital
SeriesBlue
ModelWDS400T2B0A
Device TypeInternal Solid State Drive (SSD)
Used ForConsumer
Form Factor2.5"
Capacity4TB
Memory Components3D NAND
InterfaceSATA III
Max Sequential ReadUp to 560 MBps
Max Sequential WriteUp to 530 MBps
4KB Random ReadUp to 95,000 IOPS
4KB Random WriteUp to 82,000 IOPS
Terabytes Written (TBW)600TB
MTTFUp to 1.75M hours
Features3D NAND SATA SSD for capacities up to 4TB with enhanced reliability.
Sequential read speeds up to 560 MB/s and sequential write speeds up to 530 MB/s.
An industry-leading 1.75M hours mean time to failure (MTTF) and up to 600 terabytes written (TBW) for enhanced reliability.
WD F.I.T. Lab certification for compatibility with a wide range of computers.
Free downloadable software to monitor the status of your drive and clone a drive, or backup your data.
Power Consumption (Idle)Slumber (mW): 56
DEVSLP (mW): 5-12
Power Consumption (Active)Average Active Power (mW): 60
Max Read Operating (mW): 3000
Max Write Operating (mW): 3800
Operating Temperature0°C ~ +70°C
Storage Temperature-55°C ~ +85°C
Max Shock Resistance1,500G @ 0.5 msec half sine
Max Vibration ResistanceOperating: 5.0 gRMS, 10-2000 Hz
Non-operating: 4.9 gRMS, 7-800 Hz
Height7.00mm
Width69.85mm
Depth100.20mm
Weight57.90g
Shipping weight0.09 kg
Package size137 × 102 × 20 mm

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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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