Because terabytes is a good frame of reference for most computer users. I get paid well to work in the computer space and if I saw 8 exabytes, I'd have to consu

Because terabytes is a good frame of reference for most computer users. I get paid well to work in the computer space and if I saw 8 exabytes, I'd have to consult a chart/list to just determine how much that is. Most people don't know what an exabyte is. That's why you frame the amount of data in an amount of data (terabyte) that people know.