For those serious about security, The Toshiba S300 surveillance internal hard drive has you covered from every angle. The S300 offers equally high Performance and surveillance-critical reliability Designed for 24/7 operation in your home office and small office video surveillance systems. Engineered for high durability, The S300 surveillance hard drive supports a robust workload rating and is tested to perform around-the-clock that never sleeps – so that you can.