http://www.flipkart.com/wd-my-book-esse ... v3r2ymxunz Key Features * Connectivity: USB 3.0 * External Power: Yes Western Digital, a brand well known for its quality and reliability, brings you the WD My Book Essential hard drive. The WD drive not only gives you a large storage capacity but also offers futuristic data transfer speeds with the SuperSpeed USB connectivity feature. Loaded with safety and performance enhancing software, this WD hard drive is sure to fulfil all your data storage necessities.