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Silver 3.5 inch SATA hard drive with label visible

Seagate

Seagate ST3120215AS 120GB 7200RPM SATA 3.5" internal hard drive

SKU CH-KQ5W-RN3NN

A 120 GB, 3.5-inch SATA desktop drive spinning at 7200 RPM with 2 MB cache

  • Flash memory typeSLC
  • 120 GB capacity for desktop storage
  • 7200 RPM spindle speed for responsive data access
  • SATA interface for broad motherboard compatibility
  • 5 inch form factor fits standard drive bays

120 GB SATA desktop drive

This 3.5 inch internal hard drive offers 120 GB of storage on a SATA interface. It spins at 7200 RPM and includes a 2 MB cache buffer. The drive is supplied new and suits desktop PCs requiring basic magnetic storage.

SATA interface and capacity limits

The SATA connection caps transfer speed at the bus maximum, which is lower than modern PCIe alternatives. Mechanical latency and the 120 GB capacity restrict use to light workloads or secondary storage. Buyers needing larger volumes or faster access should consider higher-capacity or solid-state options.

How it compares

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

Price $87.99
Cheaper than about 56% of the 4,938 comparable items (median $107.99).

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Specifications

Storage
Flash memory typeSLC

Questions about this item

Should I choose the 120 GB version of the ST3120215AS or look for a larger capacity?

The ST3120215AS is offered in a single 120 GB capacity. If you need more space you would need a different model.

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

The 7200 RPM spindle gives faster data access than slower drives, improving boot times and file loading in a desktop PC.

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