A network-attached storage (NAS) device is a data storage device that connects to and is accessed through a network, instead of connecting directly to a computer. NAS devices contain a processor and operating system so it can run applications and provide the intelligence needed for files to be easily shared by authorized people.  

The optimal backup strategy varies depending on each organization’s needs. This topic will address the main types of backup methods—full, incremental, and differential—along with their advantages and disadvantages to help you choose what’s best for you and your business.