The zettabyte is a computer storage unit of measure symbolized ZB.
One zettabyte is equal to 1024 exabytes (using the traditional definition of these units).
Examples of zettabyte
It was estimated in 2013 that the entire WWW occupied 4 ZB.
According to Statista’s Digital Economy Compass report, the consumption volume of the entire internet in 2018 was 33 zettabytes, a figure that is equivalent to 330 million 1 TB hard drives.
The UEFI (BIOS replacement) system allows a theoretical limit of 9.4 zetabytes of capacity on hard drives that can be attached to a computer, as opposed to the BIOS’ limit of just 2.2 TB. Of course, there is no hard drive that even remotely comes close to that storage capacity.
In Microsoft they indicate that a zettabyte is what it would take if Windows 11 were downloaded on 15,000 million devices.
The unit that follows is the yottabyte.
related terminology
Byte
Exabyte
related article
Byte unit conversions.
Name
Symbol
Binary
number of bytes
Equivalent
kilobyte
KB
2^10
1,024
=
megabyte
MB
2^20
1,048,576
1,024KB
gigabyte
UK
2^30
1,073,741,824
1,024MB
terabyte
TB
2^40
1,099,511,627,776
1,024GB
petabyte
PB
2^50
1,125,899,906,842,624
1,024TB
exabyte
EB
2^60
1,152,921,504,606,846,976
1,024PB
zettabyte
ZB
2^70
1,180,591,620,717,411,303,424
1,024EB
yottabyte
YB
2^80
1,208,925,819,614,629,174,706,176
1,024ZB
To understand the difference with kibibyte, mebibyte, gibibyte…
Read: Units of bytes.
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