Seagate 1tb 2tb 3tb 4tb Desktop Pc 3.5" Internal Mechanical Hard Disk Sata 3gb/s-6gb/s Hdd 5900-7200rpm 64mb/128mb Buffer(used) - Hard Disk Drive - AliExpress
3TB 7.2K SATA 3.5" 6Gbps Hard Disk Drive – TechMikeNY
Amazon.com: WL 3TB 7200RPM 64MB Cache SATA III 6.0Gb/s 3.5" Internal (Enterprise Grade, Heavy Duty) Hard Drive (For RAID, NAS, CCTV DVR, Desktop PC) w/1 Year Warranty : Electronics
Amazon.com: Hitachi 3TB 7200RPM 3.5in Desktop SATA Hard Drive for PC, Mac, CCTV DVR, NAS, RAID (Renewed) : Electronics