As one of its daily deals, Amazon offers the Seagate 3TB Central Network Attached Storage External Hard Drive, model no. STCG3000100, for $99.99 with free shipping. That's the lowest total price we could find by $25, although it was $20 less via pickup a month ago. This PC/Mac-compatible network attached hard drive attaches to your wired or wireless router for backup or file sharing. Deal ends today.