newegg offers the Seagate 4TB Backup Plus USB 3.0 External Hard Drive, model no. STCA4000100, for $169.99. Apply coupon code "VMEPROMOMAR13" and checkout via V.me by Visa to cut it to $152.99. With free shipping, that's $0.04/GB and the lowest total price we could find by $17, although it was $3 less two weeks ago. It's compatible with Windows and Mac and features two backup scheduling options, social network sharing, and more. Deal ends March 21.