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Silver 2.5 inch bare laptop hard drive, 7mm thin

HGST

HGST Travelstar Z5K320 0A78602 250GB 5400 RPM laptop hard drive

SKU CH-APDK-XBXFV MPN 0A78602

A 7 mm, 5400 RPM 2.5-inch SATA laptop drive delivering 250 GB capacity with 8 MB cache and low 1.6 W read/write power for longer battery life

  • Total capacity250 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Packaging typeBare Drive
  • Cache memory8 MB
  • Average seek time13 ms
  • 7mm z-height enables thinner laptop designs
  • 6W read/write power extends battery life
  • 55W idle power increases unplugged usage time
  • 400G operating shock protects data from drops
  • 5400 RPM with 8MB cache delivers quiet performance

Thin 7mm laptop drive

The HGST Travelstar Z5K320 is a 2.5-inch internal hard drive with a 7mm z-height, 250GB capacity and 5400 RPM spindle speed. It connects via SATA 3.0Gb/s and includes an 8MB cache. The slim profile allows installation in thinner notebook chassis and other compact devices.

Low power and shock rating

The drive draws 1.6W during read and write operations and 0.55W at idle, helping to extend battery life in portable systems. A 400G operating shock rating adds robustness for mobile use, while the manufacturer highlights near-silent acoustics for quiet environments.

Bare drive installation notes

The product ships as a bare drive without cables, brackets or mounting screws. Installers must reuse existing hardware or source compatible fixings separately. The 7mm thickness fits standard 9.5mm bays but may require a spacer for secure mounting in some laptops.

Not for high-performance or high-capacity needs

Buyers who want faster access times or larger single-drive capacities should consider solid-state alternatives or higher-capacity mechanical drives. Systems requiring a 9.5mm drive without a spacer or a drive with included mounting hardware are not addressed by this bare unit.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $44.99
Cheaper than about 74% of the 645 comparable items (median $66.99).
Total capacity 250 GB
Lower than about 64% of the 419 comparable items (median 320 GB).
Price per TB $179.96 per TB
Cheaper than about 59% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameHGST
Product lineTravelstar Z5K320
Model nameHTS543225A7A384 (0A78602)
Total capacity250 GB
Performance
Average seek time13 ms
Mean latency5.5 ms
Rotational speed5,400 RPM
Storage
Cache memory8 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Shipping weight0.91 kg
Package size114 × 76 × 13 mm

Questions about this item

How often will the 8 MB cache need replacement during the drive's life?

The 8 MB cache is built into the drive's controller board and has no separate replacement schedule; it lasts for the operational lifetime of the unit.

What is the first limit reached when the 5400 RPM drive runs sustained workloads?

The SATA 3.0 Gb/s interface caps maximum throughput, so sustained transfers hit the bus ceiling before the 13 ms seek time or 5.5 ms latency become bottlenecks.

How much heat and noise does the 2.5 inch drive produce when running all day?

It draws 1.6 W during read/write and 0.55 W at idle, while the manufacturer rates acoustics as near-silent for continuous operation.

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