Page 20 - Computer - 4

USB Flash Drive

A USB Flash Drive, also known as a Pen Drive, is a portable
storage device. It is used to save and transfer music, video, and

data files across computers. Its capacity ranges from 8 GB to
2 TB.

Memory Card
A Memory Card is a tiny digital storage device. It is used in portable
electronic devices such as digital cameras, mobile phones, laptops,

tablets, MP3 players, and video game consoles. Its storage capacity
usually ranges from 2 GB to 256 GB.

Knowledge Discovery Subject Enrichment

Pen drives and memory cards use circuit-based flash technology to store data. Flash

memory reads and writes data at a very high speeds. They can retain data in absence of
electric current.

TERTIARY STORAGE DEVICES

A Tertiary Storage device is a high-capacity data storage device. Tertiary storage
devices store data which is used to review or restore data after a system breakdown.

These devices are typically used for archiving and backing up enormous amounts of
data. Let us learn about some of the common tertiary storage devices.

Magnetic Tape

A magnetic tape is made of a long ribbon of plastic which has been coated with a

magnetic material. Magnetic signals are used to record data on tape. To access the
magnetic tape, a tape drive is used. It is used to store audio and video files.

Network Attached Storage (NAS)

A Network Attached Storage device has a large storage capacity. A NAS is connected
to a computer network, allowing multiple users to access data.

18