Adorama offers the Seagate 4TB Central Network Attached Storage External Hard Drive, model no. STCG4000100, for $129 with free shipping. That's $21 under our December mention and the lowest total price we've seen. (It's a current low by $3.) This PC/Mac-compatible NAS connects to your wired or wireless router for backup or file sharing.
Adorama via eBay offers the Seagate 4TB Expansion USB 3.0 External Hard Drive, model no. STEB4000100, for an in-cart price of $99.99 with free shipping. That's the lowest total price we could find today by $20, although we saw it for $11 less via rebate two weeks ago.