Amazon.com: Seagate Portable 4TB External Hard Drive HDD – USB 3.0 for PC, Mac, Xbox, & PlayStation - 1-Year Rescue Service (STGX4000400) : Electronics
Seagate SkyHawk 4TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache HD (ST4000VX007) - Datacomm Express
Expansion External Hard Drives & SSDs | Seagate US