The link you gave says that the external hard drive does not require a power cable. Does the hard drive spin up when attached to the laptop? You should be able to feel a slight vibration when the hard drive spins up. If there any indicator light on the hard drive enclosure that lights up? Did you try it with another computer? If it does not work return it.
You have to test your disk drive by connecting it directly sata interface. After check the en-closer read en-closer note. Plug the hard drive in to it carefully. connect to usb cable remove other usb devices plugged that hub or connector beside. check the power bulb on. it will not detected if bios not supported to usb hdd therefore pls open the O/S and Go to device manager in hardware refresh check detecting hard disk as a flash drive go to disk management in manage (right click on the my computer Icon and go to Manage) check shown disks (Showing as removable devices)
