WD Purple Surveillance Hard Drive / 4TB / SATA 6Gb/s / 3.5" / AllFrame Technology / 180TB Annual Workload / Supports 64 HD Cameras / 16 Bays / Corrosion-Resistant Components / 3-Year Warranty

• ✓ Up to 8 TB Total Capacity for Extended Video Storage Needs
• ✓ AllFrame Technology Reduces Frame Loss and Improves Playback
• ✓ 1,000,000 Hour MTBF for Maximum Reliability in 24/7 Operation
• ✓ Rotational Vibration Sensors Mitigate Multi-Drive Environment Vibrations
• ✓ CMR Technology for Conventional Magnetic Recording Performance
• ✓ Anti-Corrosion Components for Durable Operation in Demanding Environments