Secondary Storage Devices

List of secondary storage devices, Different type of secondary storage devices

Secondary Storage

• Data to be used, should be transferred into the primary storage devices first.

• Moderate cost.

• Speeds of these devices are based on the Data Transfer rate of individual devices.

Device	Storage Capacity	Volatile / Non-volatile	How data written?	Types
Floppy Disk	1.44 MB	Non-volatile	Magnetic
Hard Disk	Upto several TBs	Non-volatile	Magnetic
Compact Disk (CD)	Upto 700 MBs	Non-volatile	Optical	CD-R, CD-RW
USB Flash Drive (Pen Drive, USB Stick)	Few TBs	Non-volatile	Flash Integrated Circuits (Flash ICs)
Digital Versatile/Video Disk (DVD)	Several GBs	Non-volatile	Optical	DVD-R, DVD-RW
Secure Digital Card (SD card)	Several GBs	Non-volatile	Flash Integrated Circuits (Flash ICs)	SD, SDHC, SDXC

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