Bli online HDD 4 TB Seagate Video HDD - Hard Drive - 4TB Cool. Quiet. Low-Power Video Performance. Optimized for high-definition consumer DVR applications, Low power and finetuned for consistent, dependable delivery of multiple highdefinition video streams with capacities from 1TB to 6TB, Easy-tomanage multi-room video delivery of up to 16 simultaneous HD streams