Flipkart is offering Seagate 4 TB Wired External Hard Drive Black at Rs.11555. Mobile Backup Enabled, External Power Required. 4 TB Capacity; USB 3.0 Desktop Drive; Easy Back-up For PC and MAC; WARRANTY 3 Years Warranty. Easy, Flexible, Built-in Backup Options, Save Photos Automatically from Your Social Networks, Share Photos and Videos to Social Networks with a Click, Easy Backup Options, Works with PCs and Mac, Backward Compatible with USB 2.0.