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Silver 2.5 inch SATA hard drive labelled Western Digital 520 4000GB

Western Digital

Western Digital 520 SATA 4000GB 2.5 internal hard drive

SKU CH-TJNK-N4KH6

A 4000GB 2.5-inch internal hard drive with a SATA 520 interface for desktop storage

  • 4 TB capacity stores large media libraries
  • SATA interface enables broad desktop compatibility
  • 5 inch form factor fits standard drive bays
  • 520 MB/s sequential speed accelerates file transfers
  • New condition ensures full manufacturer reliability

Western Digital 520 SATA 4000GB

This Western Digital 520 SATA drive provides 4000GB of storage in a 2.5 inch form factor. It connects via a standard SATA interface for broad desktop compatibility. The drive is supplied new and first listed by the manufacturer in 2026.

Suits desktops with 2.5 inch SATA bays

Builders fitting a 2.5 inch SATA bay in a desktop chassis can use this drive directly. Systems that only accept 3.5 inch bays or lack a SATA connection cannot accommodate it without additional hardware.

SATA interface decides fit

The single specification that determines compatibility is the SATA interface. Your motherboard or controller must provide a SATA data port and matching power connector for the drive to operate.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $707.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).

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Specifications

Product
Brand nameWestern Digital

Questions about this item

Will the 2.5-inch SATA 520 drive need any firmware updates or mechanical servicing later?

The 520 SATA drive has no user-serviceable parts; firmware updates, if released by Western Digital, are applied through the host system and no mechanical maintenance is required.

What limit appears first when the 4000 GB 520 drive writes continuously?

The SATA 6 Gb/s interface caps sustained write throughput, so the bus bandwidth becomes the bottleneck before the drive's internal media limit is reached.

How much noise and heat does the 2.5-inch 520 produce during all-day operation?

The 2.5-inch form factor and SATA interface keep power draw modest, resulting in low acoustic output and minimal heat rise during continuous use.

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