Amazon.com: Toshiba MG Series Enterprise 4TB 3.5'' SATA 6Gbit/s Internal HDD 7200RPM 550TB/year 24/7 Operation. MG04ACA400E : Electronics
NeweggBusiness - Toshiba X300 4TB Performance Desktop and Gaming Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5 Inch Internal Hard Drive Retail Packaging HDWE140XZSTA
MG04ACA400NY Toshiba Enterprise Capacity 4TB 7200RPM SATA 6Gbps 128MB Cache (512n / SIE) 3.5-inch Internal Hard
MC04ACA400E - Toshiba 4TB 7200RPM SATA 6Gb/s 128MB Cache 3.5-Inch Hard Drive