- A Byte is a unit of data measurement which mainly consists of eight bits and a basic unit of storage capacity in the computer systems.
- A byte is a series of binary digits, which contain ‘0’ or ‘1’.
- A byte is represented as upper-case ‘B’ whereas a bit is represented by small-case “b”.
- It is also used by computers to represent the characters such as numbers, letters or symbols.
- A single byte can be used for indicating the 2
^{8}or 256 different values. - These values start from 00000000 Binary to 11111111 Binary.
- A nibble is a data unit which comes before the Byte. And, kilobyte comes after it.
- The byte is used for measuring the size of memory and the speed of data transfer. Examples of bytes in memory size:

And, the examples of the speed of data transfer:

- Kilobytes per second,
- megabytes per second, etc.

**Kilobyte**

- A
**KB**is the unit symbol for the**‘Kilobyte**‘. - A
**Kilobyte**is made up of multiple-unit bytes, which stores the digital information and denotes data size. - And the short forms of kilobyte are K, K-byte, and kByte.
- In the word kilobyte, kilo denotes the 1000 or third power of 10, which means 10
^{3}. - In computer science and IT, the kilobyte refers to as 1024 or 2
^{10}bytes. - A kilobyte is that unit, which is larger than a byte (B) and smaller than the unit megabyte (MB).
- Kilobyte is used for measuring the size of small files.

**Megabyte**

- A
**‘Mb**‘ is the unit symbol for the**Megabyte**. - A
**Megabyte**is a made up of multiple unit bytes, which stores the digital information and denotes the size of data. - And, the short form of Megabyte is
**Mbyte**or**meg**.

In the word megabyte, mega denotes the sixth power of 10, which means 10^{6}.

1 Megabyte is equivalent to the following values:

- 10
^{6}bytes (B), - 1,000,000 bytes (B),
- 2
^{20}bytes (B), - 1,024 kilobytes (Kb) or
- 1,048,576 bytes.
- A megabyte is that unit which is larger than a kilobyte (Kb) and smaller than the unit gigabyte (Gb).
- A megabyte is used for measuring the size of large files.
- It also measures the text format, bitmap images, video files, or compressed/uncompressed audio files.

**Gigabyte**

- A
**Gb**is a unit symbol for the**Gigabyte**. - A
**gigabyte**is made up of multiple-unit bytes, which stores the digital information and denotes the size of data. - The short form of Gigabyte is
**‘Gbyte**‘. - In the word gigabyte,
**Giga**denotes the ninth power of 10, which means 10^{9}. - In computer science and IT, the GB unit equals to 1024
^{3}or 2^{30}bytes. - 1 Gigabyte is equivalent to the following values:

- 2
^{30}bytes, - 1,000,000,000 bytes (B),
- 1,000 megabytes (MB).
- A gigabyte is that unit, which is larger than a megabyte and smaller than the unit terabyte.
- This unit is used for measuring the storage capacity.
- A solid-state drive may hold the capacity of 256 GB, and the hard drive may store the capacity of 750 GB.
- The Random-Access Memory (RAM) is also measured in Gigabytes like 1GB RAM, 2GB RAM, or 4GB RAM.

**Terabyte**

- A
**terabyte**is made up of multiple bytes, which stores the digital information and denotes data size. **TB**is a unit symbol for the terabyte.- And the short form of Terabyte is
**Tbyte**. - In the word terabyte, Tera denotes the fourth power of 1000, and means 10
^{12}. - A terabyte is approximate 1 trillion bytes.
- A petabyte just comes after the terabyte, i.e., is smaller than the petabytes and larger than the gigabytes.

Terabyte is equivalent to the following values:

- 10
^{12 }bytes, - 1000 GB (gigabytes),
- 1 Tebibyte,
- 1,000,000,000,000 bytes
- Mostly, terabytes are used for measuring the capacity of large storage devices.
- Around the year of 2007, the hard drives of consumers reached the storage capacity of 1 TB.
- It is a unit, which also measures the bandwidth or the data transferred in a certain amount of time.

**Petabyte**

- A
**Pb**is the unit symbol for the**‘Petabyte**‘. - A
**Petabyte**is made up of multiple-unit bytes, which stores the digital information and denotes the size of data. - And, the short form of Petabyte is
**Pbyte.**

A petabyte is equal to 10^{15} bytes or 2^{50} bytes.

1 Petabyte is equivalent to the following values:

- 1024 Terabytes (Tb),
- 1 million gigabytes, or
- 1,000,000,000,000,000 bytes.
- The size of the petabyte is slightly less than pebibyte.
- A petabyte is rarely used in measuring the storage capacity of devices.
- It is mostly used for measuring the data, which is stored in large computer networks or server farms.
- Like, Facebook and Google, two internet companies store more than 100 petabytes of data on their servers.
- Petabyte (Pb) is that unit that is larger than a terabyte (Tb) and smaller than the unit exabyte (Eb).

**Exabyte**

- An
**exabyte**is made up of multiple bytes, which stores the digital information and is used to denote data size. - A byte is made up of 8 bits.
- A bit is a single unit of data.
- A bit can be ‘0’ or ‘1’.
- ‘EB’ is a unit symbol for the exabyte.
- And the short form of Exabyte is
**Ebyte**. - In the word exabyte, ‘
**exa**’ denotes the multiplication by the sixth power of 1000.

Exabyte is equivalent to the following values:

- 10
^{18}bytes, - 1000
^{6}bytes, - 1000 petabytes,
- 1,000,000,000,000,000,000 ( 1 quintillion) Bytes,
- 1 billion gigabytes,
- 1 million terabytes, or
- 1,000,000 terabytes.
- And, 1000 EB (Exabyte) equals to 1ZB (Zettabyte).
- Exabytes is a unit, which is slightly smaller than the exbibytes.
- The exbibytes contain 2
^{60}bytes. - The exabyte unit is so large, so it is used to measure the sum of multiple storage networks or measure the data amount transferred over the internet in a specific amount of time.