Hard drives are used to store data, so it is mass storage. When buying a hard drive for an industrial computer, pay attention to the parameters, i.e. capacity, data transmission speed and failure-free operation time. There are three types of drives: HHD, SSD and SSHD. The capacity of the disk is expressed in gigabytes or terabytes. Industrial drives are designed to work in difficult conditions. Disks can additionally have an extended operating temperature range, remote status control or temperature sensors.