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Frequently Asked Questions

FAQ >> Understanding file sizes (Bytes, KB, MB, GB, TB)

myRepono - Website & mySQL Database Backup Service

A byte is a sequence of 8 bits (enough to represent one alphanumeric character) processed as a single unit of information. A single letter or character would use one byte of memory (8 bits), two characters would use two bytes (16 bits).

Put another way, a bit is either an 'on' or an 'off' which is processed by a computer processor, we represent 'on' as '1' and 'off' as '0'. 8 bits are known as a byte, and it is bytes which are used to pass our information in it's basic form - characters.

An alphanumeric character (e.g. a letter or number such as 'A', 'B' or '7') is stored as 1 byte. For example, to store the letter 'R' uses 1 byte, which is stored by the computer as 8 bits, '01010010'.

A document containing 100 characters would use 100 bytes (800 bits) - assuming the file didn't have any overhead (additional data about the file which forms part of the file). Note, many non-alphanumeric characters such as symbols and foreign language characters use multiple bytes.

1024 bytes

 = 

1 KB

1024 KB

 = 

1 MB

1024 MB

 = 

1 GB

1024 GB

 = 

1 TB

1024 TB

 = 

1 PB

KB

 = 

Kilobyte

MB

 = 

Megabyte

GB

 = 

Gigabyte

TB

 = 

Terabyte

PB

 = 

Petabyte

A kilobyte (KB) is 1024 bytes, a megabyte (MB) is 1024 kilobytes and so on as these tables demonstrate.

myRepono use bytes to calculate the size of the files we are storing and transferring. We then calculate the costs of the data storage and transfer based on the amount of bytes.

myRepono's charges are based on gigabytes of usage, so for example you might pay $0.20 for 1 GB of data transfer, this means you are paying $0.20 to transfer over 1 billion bytes of data (over 8 billion bits).

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