How many bytes are in a mega byte and giga byte.?

That other answer is a lie according to apple microsoft and Sony one megabyte (MB) is one million bytes and one gigabyte (GB) is one billion bytes and just some extra info one killabyte (KB) is one thousand bytes and one tillabyte (TB) is one trillion bytes and if you have never heard of a tillabyte (TB) the apple time capsule comes in memory sizes of 500 gigabytes (GB) or 1 tillabyte (TB)