The Internal 8Tb WD Purple 3.5" is a high-performance hard drive designed specifically for surveillance systems. With a massive 8 terabyte capacity, it can store footage from multiple cameras for extended periods of time. The drive is optimized for 24/7 operation, with an enhanced workload rating of up to 180TB/year. With AllFrame technology, it helps reduce video playback errors and interruptions. It's the perfect choice for those who need reliable and efficient storage for their surveillance systems.