Western Digital Surveillance Storage 3.5" 4 TB Serial ATA III

WD Purple Surveillance Storage is built for 24/7, always-on, high-definition surveillance security systems that use up to eight hard drives and up to 32 cameras.

The smart choice for surveillance – WD Purple Surveillance Storage offers exclusive AllFrame technology to bring you premium reliability and peace-of-mind when installing your home or small-to-medium business security system. Exclusive firmware upgrades work with ATA streaming to reduce error pixilation and video interruptions that occur when desktop hard drives are incorrectly used as storage in security systems. WD Surveillance Storage is built for 24/7, always-on, high-definition surveillance security systems that use up to eight hard drives and up to 32 cameras.

Choose a drive that is designed and engineered for home and business surveillance systems and enjoy the peace-of-mind you can only get from a surveillance-class hard drive.

Desktop drives vs. surveillance-class storage – WD surveillance-class storage has been tested to be compatible in a wide range of security systems. These drives are designed to replace standard desktop drives that were not designed for the harsh 24/7 always-on, high-definition surveillance environment. Desktop drives are built to run for only short intervals and are not engineered to withstand high-temperature fluctuations and equipment vibrations found in a typical surveillance application.

Surveillance storage for peace-of-mind – Whether you're protecting your personal assets and loved ones or monitoring the business you worked hard to build, you can rely on surveillance-class storage built by one of the largest hard drive manufacturers in the world. WD Purple hard drives are designed for high-temperature, always-on, surveillance security systems to ensure reliability and quality video playback when you need it most. Experience the security of knowing you're using a surveillance–class drive designed by a leader in the hard drive industry.

Improve performance with AllFrame – WD Surveillance-class hard drives are equipped with AllFrame technology which works with ATA streaming to reduce frame loss, improve playback and increases the number of drive bays supported. AllFrame reduces video interruptions that commonly occur when desktop hard drives are incorrectly used as storage in security systems. Missed frames and lost footage is a serious problem when an event occurs and surveillance footage needs to be retrieved. WD Surveillance Storage with AllFrame provides the confidence you should expect when it's time to play back and review critical surveillance footage.

Key benefits:
- Reduces video frame loss with surveillance-class storage.
- Specifically tuned for surveillance security systems.
- Caching algorithms are tuned for write-intensive, low bit rate, high stream count applications that are typical of surveillance applications.
- Priority change for write allocations and preemptive caching policies.
- TLER & ATA streaming support.
- Supports up to eight drives.

Lower power consumption – Low power consumption is crucial in high-temperature always-on surveillance environments. With exclusive IntelliSeek technology, WD Surveillance drives calculate the optimum seek speeds which lowers power consumption, noise and vibration that can damage and cause desktop drives to wear out more quickly. When you invest in a premium surveillance-class drive you worry less while enjoying the benefits over a longer period of time.

Optimized performance for up to 32 HD cameras – These hard drives are optimized to support up to 32 high-definition surveillance cameras, giving you the flexibility to upgrade and expand your security system in the future.

The WD® advantage – WD puts our products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. On average, each new product goes through 600,000 hours of testing. WD also has a detailed Knowledge Base with more than 1,000 helpful articles. You can also call toll-free support 7 days per week in the U.S. and Canada. See the WD Support site for full details.

Recommended use – WD Surveillance Storage is tested and recommended for use in surveillance and security systems up to 8 bays and optimized for 32 HD cameras. For additional surveillance capacity, look at WD datacenter hard drives. Not recommended for use in NAS environments, please consider using WD NAS hard drives for desktop RAID and NAS environments or WD datacenter hard drives for rackmount or large RAID configurations.