Lenovo 55Y9263 external hard drive 500 GB 5400 RPM USB 2.0 Black

The Lenovo USB Portable 500GB Hard disk drive (45K1690) option provides the ultimate in portability and ease of use without sacrificing capacity. Features and benefits include:
- High-speed USB 2.0 Interface.
- Compact size -- Fits in a shirt pocket.
- No requirement for AC power adapter.
- Operating system independent, no operating system drivers needed
- 500GB capacity
- 5400 rpm speed
- No Auxiliary power USB cable included
- No Carrying case included
- Innovative top cover design
- No requirement for ac power adapter -- Does not require two USB ports on systems, depending upon configuration.