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External hard disks are also available. They are the hard disks that can be connected to any
computer with the help of a USB (Universal Serial Bus) port.
Compact Disc (CD)
Compact disc (CD) is an external storage device. It can hold upto 700 MB
of data. The CD drive reads information stored on a compact disc. CD drive
is usually connected inside the CPU box but can also be connected using a
USB port. CD
Digital Versatile Disc or Digital Video Disc (DVD)
DVD is almost similar to a CD. The only difference is that it can hold
more information than a CD. DVDs are widely used for storing and
viewing movies and other data. The DVD drive reads information stored
on a DVD.
DVD
Blu-ray Disc
Blu-ray disc is an optical disc. It is used for storing a large amount of data. The
main difference between DVDs and Blu-ray discs is that storage capacity of
Blue-ray disc is higher than that of the DVD.
Blu-ray disc
Pen Drive
Pen drive is a portable storage device and is easy to use as it is small and
can be carried in a pocket and plugged into any computer with a USB
Pen drive drive. Pen drive has storage capacity of upto 1TB.
Memory Card
Memory card is commonly known as multimedia memory card. It is very small
in size usually 1-1.5 inches. These are used in smart phones and digital cameras.
You need to have a card reader to read the stored data on a memory card.
Memory card
Double Tap Century #Technology Literacy
21 st
Skills
Fill in the blanks.
1. The storage space in a computer is called .
2. ROM is the memory.
3. is a portable storage device.
Data Storage and Memory 13

