https://en.wikipedia.org/wiki/Byte#Multiple-byte_units
a Bit is on or off, a nibble is 4 bits, a byte is 8 bits,
and APPROXIMATELY (that means roughly so 1,024 = 1,000)
a kilobyte is 1,000 bytes,
a megabyte is 1,000 kilobytes
a gigabyte is 1,000 megabytes
a terabyte is 1,000 gigabytes