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Silver 3.5 inch bare SATA hard drive with exposed circuit board

HGST

HGST HDT725040VLA360 400GB 7200 RPM 16MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-QAR2-74Y7M MPN HDT725040VLA360

A 3.5-inch desktop hard drive with 400 GB capacity, 7200 RPM spindle speed and 16 MB cache for everyday storage

  • Total capacity400 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • 7200 RPM spindle speed enables quick data access
  • 16 MB cache buffer accelerates frequent read and write operations
  • SATA 3.0 Gb/s interface provides broad desktop compatibility
  • Native Command Queuing optimises command order for higher throughput
  • Thermal monitoring and fly-height control protect data integrity

Deskstar T7K500 400GB SATA drive

This 3.5-inch hard drive delivers 400GB of storage at 7200 RPM with a 16MB cache. It suits desktop builders who need a basic mechanical volume for bulk files or legacy operating systems. The SATA 3.0Gb/s interface keeps compatibility simple. It arrives as a bare drive without cables or brackets.

Check SATA port and bay space

Verify that your motherboard has a free SATA 3.0Gb/s port and that your case offers an open 3.5-inch drive bay. The unit requires standard SATA data and power connectors. No special drivers are needed for the Native Command Queuing feature. Ensure your BIOS recognises drives of this capacity before installation.

Fits standard desktop builds

The drive slides into any 3.5-inch bay and connects with two cables, leaving PCIe slots free for other cards. Its 7200 RPM spindle speed and 8.5ms seek time provide responsive access for everyday workloads. Thermal Monitoring and Fly Height Control help maintain reliability during long sessions. SMART Command Transport supports drive health reporting.

How it compares

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

Price $34.99
Cheaper than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 400 GB
Lower than about 84% of the 2,372 comparable items (median 2 TB).
Price per TB $87.48 per TB
Pricier than about 60% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHitachi GST
Product lineDeskstar T7K500
Model nameHDT725040VLA360 (0A33439)
Total capacity400 GB
Performance
Rotational speed7,200 RPM
Average seek time8.5 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.45 kg
Package size146 × 102 × 36 mm

Questions about this item

Does the bare-drive package include cables or mounting screws, or must they be purchased separately?

The drive is supplied as a bare 3.5-inch unit only; SATA data and power cables plus mounting screws are not included and must be sourced separately.

How does the 400 GB capacity with 16 MB cache compare to the larger 500 GB Deskstar T7K500 models?

The 400 GB model shares the same 7200 RPM spindle speed and SATA 3.0Gb/s interface, but offers less storage and the same 16 MB cache as the 500 GB variants.

What real-world benefit does the 8.5 ms average seek time give when the drive is installed in a desktop PC?

An 8.5 ms seek time means the read/write heads position quickly, reducing latency during file access and boot sequences on a typical desktop workload.

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