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Compact Disc (CD): The CD drive reads information stored on a Compact Disc (CD). CD is an
external storage device. The lifespan of an optical disc is longer than a magnetic disc. It can
hold up to 700 MB of data.
Types of CDs:
• CD-ROM (Compact Disc Read Only Memory): It contains data that was written when the
CD was manufactured. The data cannot be modified or erased.
• CD-R (Compact Disc Recordable): It can be used to write data by
the user only once. This data cannot be changed or erased.
• CD-RW (Compact Disc Rewritable): It can be used to write data
again and again. The data can be erased and modified as many
times as required. CD
Digital Versatile/Video Disc (DVD): It is a widely used and popular
storage device. It 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.
DVD
Blu-ray Disc: It is an optical disc. It is used for storing a large amount
of data and playing videos. The main difference between a DVD and a
Blu-ray disc is storage capacity.
Blu-ray Disc
Flash Drive: Also known as pen drive, it is a small portable data storage device integrated
with a Universal Serial Bus (USB) connector.
• Pen Drive: Its compact size allows it to be easily carried in a pocket
and plugged into any computer with a USB port. It typically offers
storage capaicty of up to 1 TB.
Pen Drive
Memory Card: It is commonly known as multimedia memory card. It
is usually 1–1.5 inches in size and are most often used in mobile phones
and digital cameras. A card reader is needed to read stored data on a
memory card.
Memory Card
Solid State Drive: It is a storage device that uses flash memory to store
data, offering faster access speeds than traditional hard disk. Unlike HDDs, SSDs have no
moving parts, making them more durable, quieter, and quicker in terms of data retrieval
and boot times. SSDs are commonly used in modern computers and laptops for improved
performance.
14 Touchpad iPRIME (Ver. 2.2)–VII

