1024 bytes is binary counting while 1000 bites is decimal counting.
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A terabyte is a trillion (short scale) bytes, 1012 bytes, or 1000 gigabytes.The four larger official prefixes are:petabyte = 1015 bytes = 1000 terabytesexabyte = 1018 byteszettabyte = 1021 bytesyottabyte = 1024 bytesFor values based on 1024 rather than 1000:tebibyte = 240 bytes = 1024 gibibytes (giga-binary-bytes)pebibyte = 250 bytesexbibyte = 260 byteszebibyte = 270 bytesyobibyte = 280 bytes
1000 terabytes is a petabyte.There are competing scales, increased by 1000 or 1024 (binary, 210). A terabyte is a trillion (short scale) bytes, 1012 bytes, or 1000 gigabytes, and the four larger official prefixes are:Petabyte = 1015 bytesExabyte = 1018 bytesZettabyte = 1021 bytesYottabyte = 1024 bytesFor values based on 1024 rather than 1000:Tebibyte = 240 bytes = 1024 gibibytes (giga-binary-bytes)Pebibyte = 250 bytesExbibyte = 260 bytesZebibyte = 270 bytesYobibyte = 280 bytes
A billion is a thousand-million. Metric Units: Deca - Ten Hecto - Hundred Kilo - Thousand Mega - Million Giga - Billion Tera - Trillion Many of the prefixes are uncommonly used. But, say, for example you had a billion grams (gigagram) and you wanted to convert it to megagrams, you would multiply it by 1000. So... one gigagram would be 1000 megagrams. Now, it gets a little more complicated when one talks about computers. Computers are based on factors of 2. 210 = 1024 which is the "standard" base for many computer calculations, especially those using metric prefixes. So, a kilobyte would be 1024 bytes. a megabyte is 1024 kilobytes, or 1024*1024 bytes = 1,048,576 bytes a gigabyte is 1024 megabytes, or 1024*1024*1024 bytes = 1,073,741,824 bytes. a terabyte is 1024 gigabytes, or 1024*1024*1024*1024 bytes = 1,099,511,627,776 bytes.
To what? 1 Kilobyte = 1024 bytes 1 Megabyte = 1024 Kilobytes 1 Gigabyte = 1024 Megabytes 1 Terabyte = 1024 Gigabytes Hard drive manufacturers use a decimal, base 10 conversion rate to calculate capacity where 1GB = 1 Billion Bytes or 1000^3 Bytes. However, most Operating Systems use a binary, base 2 conversion rate where 1GB = 1.074 Billion Bytes or 1024^3 Bytes. Therefore, an advertised 250GB (250 Billion Bytes) hard drive's capacity based on your system's standard is 233GB.
For measuring computer storage (memory), both gigabyte and terabyte are larger. See related link for more prefixes. Note that there has been some confusion with using the 'metric' prefixes with memory. Originally, a kilobyte was 1024 bytes (not 1000), and a megabyte was (1024 x 1024 = 1048,576 bytes)