Surveillance System Hard Drive, 1TB, 2TB, 4TB Security GradeDescription Surveillance System Hard Drive, 1TB, 2TB, and 4TB Security Grade The Surveillance Hard Drive, which comes with either 1TB, 2TB, or 4TB of Security Grade memory storage, is specifically designed to provide data storage space for our digital video recorders. This hard drive supports video feed memory of up to 64 cameras. With up to 4TB of storage, this hard drive is ideal for any surveillance system. Features Features Security grade for