WD Purple 3.5″ Sata 4TB, 256MB, 5400

– 8TB storage capacity
– 3.5″ form factor
– 256MB cache
– 7200 RPM
– Surveillance series

– 10TB storage capacity
– 256MB cache
– 3.5″ form factor
– SATA interface
– 7200 RPM spindle speed