1 Kb is 1,024 bytes 1 MB (megabyte) is 1,024 kilobytes 1 GB (gigabyte) is 1,024 megabytes 1 Terabyte is 1,024 Gigabytes 1 Petabyte is 1,024 terabytes 1 Exabyte is 1,024 petabytes 1 Zettabyte is 1,024 petabytes 1 Yottabyte is 1,024 zettabytes And there may be others bigger. That's as far as my knowledge goes.