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Silver 3.5 inch SATA hard drive bare drive with printed label

Western Digital

Western Digital WD3200AAJS 320GB 7200 RPM 8MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-DJGD-ECHDN MPN WD3200AAJS

A 3.5-inch SATA desktop hard drive with 320 GB capacity, 7200 RPM speed and 8 MB cache for primary storage upgrades

  • Total capacity320 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory8 MB
  • 320 GB capacity stores large media libraries
  • 7200 RPM spindle speed accelerates file access
  • 8 MB cache buffers frequent read operations
  • SATA 3.0 Gb/s interface enables fast data transfers
  • WhisperDrive and SoftSeek technologies reduce acoustic noise

Capacity and interface

The Western Digital Caviar Blue WD3200AAJS is a 320GB desktop internal hard drive with a SATA 3.0Gb/s interface. It spins at 7200 RPM and provides an 8MB cache in a standard 3.5 inch form factor. The bare drive is supplied new and is suited for basic storage expansion or replacement in compatible systems.

Who this suits and who it does not

This drive fits older desktops or legacy builds that need a 3.5 inch SATA drive with modest capacity. It is not suited for users who need more storage space, faster data access, or drives still covered by the original manufacturer warranty.

Specification that decides fit

The SATA 3.0Gb/s interface and 320GB capacity determine whether this drive matches the host controller and storage requirement. Verify the system accepts a 3.5 inch SATA device before purchase.

How it compares

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

Price $38.99
Cheaper than about 87% of the 4,938 comparable items (median $107.99).
Total capacity 320 GB
Lower than about 87% of the 2,372 comparable items (median 2 TB).
Price per TB $121.84 per TB
Pricier than about 68% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWestern Digital
Product lineCaviar Blue
Model nameWD3200AAJS
Total capacity320 GB
Performance
Rotational speed7,200 RPM
Average seek time8.9 ms
Mean latency4.2 ms
Storage
Cache memory8 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height25.4 mm
Maximum width101.6 mm
Maximum length147 mm
Shipping weight0.91 kg
Package size222 × 152 × 76 mm

Questions about this item

Does the bare drive ship with cables, screws or a mounting bracket, or must those be sourced separately?

The drive is supplied as a bare unit only; SATA data and power cables plus mounting screws are not included and must be obtained separately.

The drive is listed as 320 GB with 8 MB cache — is there any other capacity or cache option for this exact model?

WD3200AAJS exists only in the 320 GB capacity with 8 MB cache; no alternative capacity or cache size is produced for this model number.

What does the 7200 RPM spindle speed mean for everyday desktop use?

The 7200 RPM rotation gives faster sequential throughput and lower access latency than slower desktop drives, improving boot and application load times.

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