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Flash Drive

The Flash Drive is a small portable data storage device integrated with a Universal
Serial Bus (USB) connector.

Pen Drive

A Pen Drive acts as a portable hard drive and is easy to use as it is
small and can be carried in a pocket and plugged into any computer
with a USB port. A pen drive has a storage capacity of up to 1 TB.

The USB flash drive is based on flash memory, which was created in the
early 1980s by Fujio Masuoka.

Memory Card

A Memory Card is commonly known as a multimedia memory
card. It is very small in size, usually 1–1.5 inches. These are
used in mobile phones and digital cameras. You need to have a
card reader to read the stored data on the memory card.

Measuring the Computer’s Memory

The basic unit for measuring the memory of a computer is the byte. A byte consists
of a group of eight bits, for example, 10001011, that is, 1 byte equals 8 bits. A group
of 4 bits is known as a nibble (half a byte), for example, 1001, that is, 1 nibble equals
4 bits. Other units for measuring the computer’s memory are Kilobyte, Megabyte,

Gigabyte, Terabyte, and so on.

8 bits 1 Byte 1024 Bytes 1 Kilobyte (KB)

1024 Megabytes 1 Gigabyte (GB) 1024 Kilobytes 1 Megabyte (MB)

1024 Gigabytes 1 Terabyte (TB) 1024 Terabytes 1 Petabyte (PB)

1024 Exabytes 1 Zettabyte (ZB) 1024 Petabytes 1 Exabyte (EB)

1024 Zettabytes 1 Yottabyte (YB) 1024 Yottabytes 1 Brontobyte

1024 Brontobytes 1 Geopbyte

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