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Orders of magnitude of data. The yottabyte is a multiple of the unit byte for digital information. The prefix yotta indicates multiplication by the eighth power of 1000 or 1024 in the International System of Units (SI), and therefore one yottabyte is one septillion (one long scale quadrillion) bytes. The unit symbol for the yottabyte is YB.
KB is kilobyte, MB is megabyte, GB is gigabyte, TG is terabyte. A single bit is the value of 1 or 0. A byte is 8 bits. A kilobyte is 1024 bytes. A megabyte 1,024 kilobytes or 1,048,576 bytes. A gigabyte is 1,024 megabytes or 1,048,576 kilobytes.