Unit of Measurement 

bit= 1 bit

byte= 8 bits

kilobyte= 1,024 bytes

megabyte= 1,024 kilobytes

gigabyte= 1,024 megabytes

terabyte= 1,024 gigabytes

petabyte= 1,024 terabytes

exabyte= 1,024 petabytes

zettabyte= 1,024 exabytes

yottabyte 1,024 zettabytes