Opening external hard drive

i am waiting for a long time since i connected my WD external hard drive passport essential…please can anyone help me to open it…

Open like in viewing the files on the drive?

This article will help:

How to use a WD external hard drive with your computer

http://wdc.custhelp.com/app/answers/detail/a_id/1717

If by open you mean removing from the enclosure, we do not recommend nor we provide instructions for that.

Removing the drive from the enclosure voids the Warranty.