Western Digital WD40PURZ 3.5-inch Internal HDD — 4TB, 5400 RPM, 64MB Cache

The Western Digital WD40PURZ is a 3.5 in. internal hard drive designed for surveillance applications. Unlike ordinary desktop drives that are intended for intermittent use, this model is engineered specifically for surveillance security systems and sustained operation. Key specifications: Capacity — 4TB; Speed — 5400 RPM; Cache — 64MB. Ideal for continuous recording in security camera environments. SKU: ESTD1081