sentence: Secondary storage includes hard drives.
sentences_before: Examples for such media are tape drives. Modern CPUs have registers that can store data, they also often have several levels of cache. Finally, there is the main memory the CPU can access. These three are usually referred to as 'Primary' data storage. Secondary storage is usually not directly accessible by the CPU, and data needs to be transferred to primary storage to be available.
concept_name: secondary storage
headings: Computer data storage
categories: Computing