Question

the unit of measure equal to approximately 1 million byte is called a dash​

Answer 1

The unit is megabyte(MB)

Answer 2

The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures.