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320GB Laptop Thin Hard Disk Drive

2.5-Inch | SATA 3.0Gb/s | 5400RPM | 16MB Cache
Thin Laptop Computing Savvy
Seagate® Laptop Thin HDD (formerly Momentus® Thin) offers feature-rich, slim, lightweight style at price and capacity points that enable no-compromise designs for thin computing.
Opens New Frontiers for System Designers
Seagate has purpose-built the Laptop Thin HDD to meet your demand for affordable, slimmer, fully functional computing solutions. While traditional laptop hard drives offer a z-height of 9.5 mm, the Laptop Thin HDD stands apart with a z-height of just 7mm.
Smooth Migration to Advanced Format 4K
Laptop Thin HDDs include Seagate SmartAlign technology. This innovation provides easy access to all the benefits of the new Advanced Format 4K sector standard—no utilities, no extra steps. AF drive migration happens automatically in the background. The drive's performance is not affected, and there is no need for the time-consuming utilities that are required by other AF-enabled drives.
Enter Seagate Ingenuity
Until recently, system integrators and OEMs had no choice but to limit their thinner, fully functional computing designs to high-end devices. The available hard drive options were either too costly, performed too slowly, or both.
Seagate Laptop Thin HDD drives leverage current laptop drives in both material and product design to provide the world's first 7mm 2.5-inch form factor drive. The result is affordable, thin storage for entry-level to mainstream laptops, high-end netbooks, thin ultraportables and slim-computing devices.

320GB Seagate Laptop Thin Specifications:


Form Factor
2.5″ HDD
SATA 3Gb/s
Formatted Capacity2
Rotational Speed
5,400 RPM
Cache / Data Buffer
Manufacturer Model Number
RoHS Compliant


Height (max)
7.0mm (0.275″)
Width (max)
70.10mm (2.760″)
Length (max)
100.55mm (3.959″)
Weight (typical)
95g (0.209 lbs.)
Data Heads
Number of Disks
Guaranteed Sectors
Bytes per Sector
Areal Density


Contact Start-Stops
Nonrecoverable Read Errors
1 per 1014 bits read


Transfer Rate (Max)
3.0 Gb/s
Track-to-track Seek
Average Seek Time
Average Latency


Maximum Start Current, DC
1.0 Amp
Seek Power
1.4 Watts
Read Power
1.2 Watts
Write Power
1.7 Watts
Idle Mode
1.2 Watts
Idle Mode, Active
0.7 Watts
Idle Mode, Low Power
0.45 Watts
Standby Mode
0.18 Watts
Sleep Mode
0.18 Watts

Environmental (Operating)

325 G max at 2ms
Ambient Temperature (°F)
41°F to 131°F
Ambient Temperature (°C)
5°C to 55°C
2 Gs (0 to peak, 5-200 Hz)
1 Gs (0 to peak, 201-500 Hz)
Relative Humidity (non-condensing)
5 ∼ 90%
-304.8 m to 3,048 m (-1,000 ft to 10,000+ ft)

Environmental (Non-Operating)

1000 G max at 1ms
Ambient Temperature (°F)
-40°F to 158°F
Ambient Temperature (°C)
-40°C to 70°C
5 Gs (0 to peak, 5-500 Hz)
Relative Humidity (non-condensing)
5 ∼ 95%
-304.8 m to 12,192 m (-1000 ft to 40,000+ ft)


Idle (Typical)
2.0 bels
Seek (Typical)
2.2 bels
  1. 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  3. Specific application environments such as temperature and duty cycle will affect the overall reliability rates.
Manufacturer provided specifications for Seagate p/n ST320LT007 UPC#: 763649042823


The best warranty is one you never have to use - but should the need occur - we're proud to provide a superior level of support and service coverage to our customers.

2 Year Seagate Warranty
OWC is proud to offer an extended replacement window of 90 days on new internal hard disk drives. Once a return authorization number has been issued and we receive the problematic drive back, you will get a brand new replacement drive, rather than a factory refurbished drive. After 90 days, the drive is fully backed by the manufacturer to be free from defects in material and workmanship for the remainder of the two year warranty period.
Seagate 320GB Laptop Thin HDD Mfr P/N: ST320LT007 MacSales.com SKU: SEAST320LT012 Internal 2.5" Hard Drive 2 Year OWC Fulfilled Limited Warranty Ships: Same Day Only $49.00Garage Sale Price $28.79
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