Brands Guides About
Seagate ST9120821AS 120GB 5400RPM SATA Hard Drive — main product image
Seagate

Seagate ST9120821AS 120GB 5400RPM SATA Hard Drive

Reliable Storage for Your Mobile Needs The Seagate Momentus 5400.2 (ST9120821AS) offers dependable storage for laptops and other portable devices. With a capacity of 120GB, a SATA 1.5Gbps interface, and a 5400RPM spin speed, this 2.5-inch internal hard drive delivers a balance of performance and ...

$16.95*
✓ In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Aug 29, 2026.Price and availability are subject to change — details.

Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Reliable Storage for Your Mobile Needs

The Seagate Momentus 5400.2 (ST9120821AS) offers dependable storage for laptops and other portable devices. With a capacity of 120GB, a SATA 1.5Gbps interface, and a 5400RPM spin speed, this 2.5-inch internal hard drive delivers a balance of performance and storage capacity.

Specifications

  • Brand: Seagate
  • Model: ST9120821AS
  • Series: Momentus 5400.2
  • Capacity: 120GB
  • Interface: SATA 1.5Gbps
  • RPM: 5400RPM
  • Cache: 8MB
  • Form Factor: 2.5-inch

Specifications

Brand
Seagate
Model
ST9120821AS
Capacity
120GB
RPM
5400RPM
Interface
SATA
Type
Hard Drive

Similar Products

Other products from the same family that visitors often consider:

Seagate ST3120026AS 120 GB SATA Barracuda Hard Drive✓ Available

Seagate ST3120026AS 120 GB SATA Barracuda Hard Drive

$52.92
View on Amazon →
Seagate ST905003N1A1AS-RK 500GB 5400RPM SATA Hard DriveCurrently Unavailable

Seagate ST905003N1A1AS-RK 500GB 5400RPM SATA Hard Drive

Check on Amazon →
Seagate ST9160314AS-RFB 160GB 5400RPM Hard Drive✓ Available

Seagate ST9160314AS-RFB 160GB 5400RPM Hard Drive

$111.25
View on Amazon →
Seagate ST4000DM001 4TB SATA 3.5 Hard DriveCurrently Unavailable

Seagate ST4000DM001 4TB SATA 3.5 Hard Drive

Check on Amazon →
Seagate Constellation.2 500GB SATA 2.5" Hard Drive (Renewed)✓ Available

Seagate Constellation.2 500GB SATA 2.5" Hard Drive (Renewed)

$154.00
View on Amazon →

Frequently Asked Questions

This Seagate hard drive offers a storage capacity of 120GB, suitable for various data storage needs.
The hard drive operates at a spindle speed of 5400RPM, providing a balance between performance and power consumption.
This hard drive utilizes a SATA interface, which is a common and widely compatible connection standard for internal drives.
The ST9120821AS model with a 5400RPM speed and 120GB capacity is typically suited for laptop or smaller form-factor PC applications.
The listing specifies a SATA interface, but does not detail the exact generation (e.g., SATA I, SATA II, SATA III). Compatibility should be broad across SATA systems.

Related Products