Portable Hard Disk:
1) Interface Type: USB 2.0
2) Turning Speed: 5400rpm
3) 8M Volume Buffer
4) Fast Delivery

Mobile Hard Disk 320GB Hard Drives:

Features:

Type: Mobile hard disk
Capacity: 320GB
Size: 2.5"
Interface Type:
Data Transfer Rate: 480Mbps
Spindle Speed:5400 rpm
Buffer Size: 8MB 

The removable disk in the system of the actual capacity:

80G (factory marked capacity) = 74G (in the system displays the available capacity)
120G (factory marked capacity) = 111G (in the system displays the available capacity)

160G (factory marked capacity) = 148G (in the system displays the available capacity)

250G (factory marked capacity) = 232G (in the system displays the available capacity)

320G (factory marked capacity) = 298G (in the system displays the available capacity)

500G (factory marked capacity) = 465G (in the system displays the available capacity)

640G (factory marked capacity) = 595G (in the system

1000G (factory marked capacity) = 930G (in the system displays the available capacity)

Package contents:

USB 2.0 portable hard drive
USB cable 

---  Welcome your inquiry for further information  ---