Western Digital Blue 1TB 2.5" SATA III Hard Drive - Reliable Storage

Western Digital Purple 2TB 3.5" SATA 6GB/s 5400RPM Surveillance Internal Hard Drive

2TB Western Digital Blue 3.5" SATA III Hard Drive - 7200RPM, 256MB Cache

Western Digital WD Red Plus 4TB NAS 3.5" Internal Hard Drive 5400 RPM Class, SATA 6Gb/s, CMR, 256MB Cache

4TB Western Digital Red Plus 3.5" SATA III Hard Drive - 5400RPM, 256MB Cache

Western Digital WD Red Plus 8TB NAS 3.5" Internal Hard Drive 5640 RPM Class, SATA 6Gb/s, CMR, 128MB Cache

Western Digital WD Red Pro 16TB NAS 3.5" Internal Hard Drive 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache