Today only, Newegg offers the Seagate 4TB USB 3.0 Portable External Hard Drive for the in-cart price of $94.99. Coupon code "EMCTWVE38" cuts it to $79.99. With free shipping, that's $10 under our mention from last December and the lowest price we've seen. (It's the best deal now by $20.) It features mobile backup via an app for both iOS and Android devices.