The Internal 2Tb WD Purple 3.5" is a high-quality hard drive designed for use in surveillance systems. With a generous 2Tb storage capacity, it can store large amounts of video footage and other data. The drive is built to withstand the demands of constant video recording, with advanced firmware that ensures reliable performance. It also features a 3-year limited warranty for added peace of mind. This drive is an excellent choice for anyone looking for a reliable and durable storage solution for their surveillance system.