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According to the International System of Units: 1 terabyte (TB) = 10004 bytes (B) = 1012 B = 1,000,000,000,000 B

This is the definition used for hard drives, large data arrays, and other things this size. That is 1,000 times a gigabyte (GB) or 1,000,000 times a megabyte (MB), which is a million million bytes.

Among other things, a computer often uses one byte of space, in memory or on disk or tape, to represent one character (such as "c" or "&"). To think practically how much information a terabyte of disk space holds, let's assume we're storing text from magazine pages on a computer that does use one byte per character. At an average 5,000 characters per page, 1TB of disk space could hold 220 million pages of text!

(When referring to computer memory, 1000 is be replaced by 1024. This is because 1024 is the nearest power of 2 to a thousand. 1024 is 210. Memory does not exist in terabyte sizes, though, so "terabyte" always has the standard definition of 1,000,000,000,000 bytes.)

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13y ago

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