Secondary memory
•Storage devices hold data, even when the computer is turned off.
•The physical material that actually holds data is called a storage medium. The surface of a floppy disk is a storage medium.
•The hardware that writes data to or reads data from a storage medium is called a storage device. A floppy disk drive is a storage device.
•The two primary storage technologies are magnetic and optical.
Magnetic Storage devices:
•Diskettes (floppy disks) (FDD)
•Hard disks (HD)
•High-capacity floppy disks (ZIP Disk)
•USB flash drive
•Magnetic tape
Optical Storage devices:
•Compact Disk Read-Only Memory (CD-ROM)
•Digital Video Disk Read-Only Memory
(DVD-ROM)
•CD-Recordable (CD-R)
•CD-Rewritable (CD-RW)
•PhotoCD