A nonvolatile storage medium, such as a disk drive, that stores program instructions and data.
Secondary Storage is the non-volatile or semi-permanent storage in your computer for holding files and information until it is needed. Secondary Storage includes devices like hard drives, floppies, CD-ROMS and tape drives. As opposed to Primary Storage which is the volatile or temporary storage (RAM) that the CPU uses for processing data and instructions. When the computer is shut off or loses power, all data in Primary Storage is lost but anything in Secondary Storage is retained.
Permanent data storage on magnetic disk, CD-R, and/or magnetic tape. (Compare with primary storage and RAM.)