TigerDirect offers the Matsunichi 1TB USB 3.0 Portable External Hard Drive, model no. DM-256-BK-1TB, bundled with Total Defense Premium Internet Security 5-User for Windows for $89.99. This $60 mail-in rebate drops it to $29.99. With around $4 for shipping, that's $26 under the lowest total price we could find for the hard drive alone and one of the least expensive 1TB USB 3.0 portable HDDs we've seen. It features data transfer speeds of up to 10Gbps. Deal ends October 31.

Of note, the software must be activated before the rebate can be redeemed, which involves providing your credit card information. However, you can cancel the service at any time within the first year without incurring any additional charges.