How Computers Store Information
A computer is any device that can store and process information. One unit of digitally stored information is equal to one bit. A bit is represented as either a 1 or a 0. The table below shows the relationship between the different file storage sizes used by computers.
Binary calculations are based on units of 1.024, and decimal calculations are based on uints of 1,000. This is because decimal calculations are based on units that have been rounded to the nearest 1,000 and therefore are different from the actual number of bytes used in binary calculations.
Binary calculations are based on units of 1.024, and decimal calculations are based on uints of 1,000. This is because decimal calculations are based on units that have been rounded to the nearest 1,000 and therefore are different from the actual number of bytes used in binary calculations.
Name

Symbol

Binary Measurement

Decimal Measurement

Number
of Bytes

Equal
to

kilobyte

KB

2^10

10^3

1,024

1,024bytes

megabyte

MB

2^20

10^6

1,048,576

1,024KB

gigabyte

GB

2^30

10^9

1,073.741,824

1,024MB

terabyte

TB

2^40

10^l2

11,099,511,627,776

1,024GB

petabyte

PB

2^50

10^15

1,
125,899,906,842,624

1,024TB

exabyte

EB

2^60

10^l8

1,
152,921,504._{1}606,846,976

1,024PB

zettabyte

ZB

2^70

10^21

1,180,591,620,717,41
1,303,424

1,024EB

yottabyte

YB

2^80

10^24

1,208.925,819.614,629,174,706,176

1,024ZB

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