BUFFALO TeraStation 3010 Series TS3410RN0802 - NAS server - 4 bays - 8 TB - rack-mountable - SATA 6Gb/s - HDD 4 TB x 2 - RAID 0, 1, 5, 6, 10, JBOD - Gigabit Ethernet - TAA Compliant - with 24/7 North American based support - Walmart.com
Western Digital Purple 4TB 3.5" 5.4K SATA HDD WD40PURX *DAMAGED LABELS | eBay
Amazon.com: Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD40PURZ : Electronics
WD WD1600AVBS AV WD1600AVBS 160 GB Hard Drive - Internal - SATA (SATA/300) - Newegg.com
Seagate 4tb SATA 3.5" Inch Hard Drive 5900 RPM St4000dm000 4 TB for sale online | eBay
Amazon.com: HGST Ultrastar 7K4000 4TB 64MB Cache 7200RPM SATA 6.0Gb/s 3.5inch Internal Hard Drive (for NAS, Desktop PC/Mac, Surveillance Storage, CCTV DVR) - 5 Year Warranty (Renewed) : Electronics