HGST

First 7200 RPM, 320GB, in a 7mm, single-disk design
Advanced Format, 512-byte emulation
First 6Gb/s SATA interface on a mobile HDD
Low power consumption
Halogen-free for eco-friendly design
Enhanced availability (EA) models for applications needing around-the-clock access in lower-transaction environments
Applications / Environments

Notebooks and ultra-portable PCs (DELL, Compaq, HP, IBM, Gateway, eMachine, Lenovo, Sony)
Tablets
Compact desktop PCs
External storage
Gaming consoles
Blade servers (EA)
Network routers (EA)
Video surveillance, CCTV DVR (EA)

Specification:

Manufacturer Hitachi
Manufacturer Part # HTS725032A7E630
Data Storage Formatted Capacity 320GB
Data Transfer Rate To/From Media 600 Mbps
Buffer 32 MB Cache
Seek Time Average 8 ms
Rotational Speed 7200RPM
Interface SATA 6.0Gb/s