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Seagate ST320LT012 320GB Laptop Thin Hard Drive — main product image
Seagate ST320LT012 320GB Laptop Thin Hard Drive
Seagate ST320LT012 320GB Laptop Thin Hard Drive
Seagate ST320LT012 320GB Laptop Thin Hard Drive
Seagate

Seagate ST320LT012 320GB Laptop Thin Hard Drive

Slim 7mm laptop hard drive delivering 320GB of reliable storage with 5400RPM speed and Smart Align technology.

$49.00*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Sep 04, 2026.Price and availability are subject to change — details.

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Overview

The Seagate ST320LT012 Laptop Thin hard drive is designed for notebooks and ultrabooks where space is at a premium. With its 7mm z-height, it fits into slim chassis that cannot accommodate the standard 9.5mm drives, making it a practical upgrade or replacement option for thin-and-light laptops. The drive offers 320GB of storage capacity, a 5400RPM spindle speed, and a 16MB cache buffer, delivering steady performance for everyday tasks like web browsing, document editing, and media playback.

The SATA 3Gb/s interface ensures broad compatibility with a wide range of laptops, while Seagate's Smart Align technology handles Advanced Format 4K sector alignment transparently — no additional utilities or manual partition alignment steps are needed. This makes installation straightforward for users upgrading or replacing a failed drive. While the 5400RPM speed and modest capacity place this drive squarely in the basic storage tier, it remains a solid choice for users who need a reliable, slim mechanical drive at an affordable price point.

Key Features

Slim and lightweight style with laptop encryption as option

Compatible with SATA 6Gb/s and 3Gb/s designs

Up to 500GB capacity

7200 RPM options available

2 year warranty

Specifications

Brand
Seagate
Model
ST320LT012
Series
Momentus Thin 5400.9
Capacity
320 GB
Form Factor
2.5-Inch
Z-Height
7mm
Spindle Speed
5400 RPM
Interface
SATA 3Gb/s
Cache
16 MB
Technology
Smart Align (Advanced Format 4K)

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Frequently Asked Questions

The drive has a 7mm z-height, making it compatible with ultrabooks and thin laptops that cannot accommodate standard 9.5mm drives.
It uses a SATA 3Gb/s (SATA II) interface, which is compatible with both SATA II and SATA III laptop connectors.
Smart Align is Seagate's technology that automatically handles the transition to Advanced Format 4K sectors without requiring additional software or manual configuration.
Yes, it can serve as a primary boot drive, though its 5400RPM speed means boot and application load times will be slower compared to 7200RPM or SSD alternatives.

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