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Silver rectangular 2.5 inch SATA SSD with label showing 4TB capacity

SanDisk

SanDisk WDS400T3B0A-00C7K0 4TB 2.5" SATA internal SSD

SKU CH-5QZ1-T8W2S MPN WDS400T3B0A-00C7K0

A 4 TB 2.5" SATA III internal SSD with DRAM cache, 3D NAND TLC, up to 560 MB/s read and 520 MB/s write, 90,000 read IOPS, 82,000 write IOPS, and 400 TBW endurance

  • Total capacity4 TB
  • Sequential read speedUp to 560 MB/s
  • Sequential write speedUp to 520 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Intended useConsumer

Model 4TB

  • Fast creative workflows with sequential reads up to 560 MBps
  • Responsive multitasking from 90,000 random read IOPS
  • Long-term reliability backed by 400 TBW endurance
  • DRAM cache sustains consistent performance under load
  • Low idle power extends laptop battery life

4TB SATA III SSD for creative workloads

The SanDisk WD Blue SA510 4TB drive uses 3D NAND TLC memory and a DRAM cache to serve content creators and everyday users who need a large, reliable SATA upgrade. It fits any 2.5-inch bay and connects through the standard SATA III interface for broad desktop and laptop compatibility.

Capacity and headroom

Four terabytes provide ample space for project files, media libraries and operating systems, while the 400TB TBW endurance rating supports heavy write cycles over the drive’s life. Sequential reads reach 560MBps and writes 520MBps; random performance tops out at 90,000 read IOPS and 82,000 write IOPS, beyond which sustained throughput will level off.

Thermals, noise and power draw

With no moving parts the drive runs silently and produces minimal vibration compared to mechanical disks. Active power averages 60mW, peaking at 1,800mW during reads and 2,000mW during writes, while idle slumber draws 36mW and DEVSLP only 12mW. The operating range spans 0°C to 70°C, keeping temperatures in check under normal workloads.

How it compares

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

Price $479.99
Pricier than about 80% 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 $120.00 per TB
Cheaper than about 73% 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
Product lineSA510 SATA
Model nameWDS400T3B0A
Total capacity4 TB
Intended useConsumer
Performance
Sequential read speedUp to 560 MB/s
Sequential write speedUp to 520 MB/s
Random read (4K)Up to 90,000 IOPS
Random write (4K)Up to 82,000 IOPS
Storage
NAND flash type3D NAND TLC
Cache memoryDRAM
Write endurance400 TB
Connectivity
Connection protocolSATA
Ports & slots
Interface typeSATA III
Power
Idle power drawSlumber (mW): 36
DEVSLP (mW): 12
Active power drawAverage Active Power (mW): 60
Max Read Operating (mW): 1,800
Max Write Operating6 (mW): 2,000
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width69.85 mm
Product depth100.2 mm
Product weight34.6g
Shipping weight0.06 kg
Package size173 × 117 × 19 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 Vibration: 5.0 gRMS, 10-2000 Hz
Non-operating Vibration: 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

Will the 2.5" SATA III connection on the WD Blue SA510 work with my older laptop that only has a 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 delivering the rated 560 MBps read and 520 MBps write speeds after installation?

Run a benchmark tool such as CrystalDiskMark or AS SSD and compare the sequential read and write results to the 560 MBps and 520 MBps specifications.

Does the retail package include a 2.5" to 3.5" mounting bracket or a SATA data cable for a desktop install?

The box contains the 4 TB 2.5" SSD and a download code for Acronis True Image cloning software; mounting brackets and SATA cables are not included.

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