Amazon has the Seagate Backup Plus 4 TB USB 3.0 Desktop External Hard Drive for only $140 with free shipping or free 2-Day for Prime members. We recently featured this same drive at eBay for $150, although it was $130 from Staples for a weekend. Newegg and Best Buy are both currently selling it for $190. This massive drive features a USB 3.0 transfer rate, promising 30% faster transfer rates over most portable hard drives. Almost 700 Amazon reviewers rate this drive 4 stars.