Question: A gigabyte is one billion bytes; a terabyte is one trillion bytes. A byte is eight bits, each a zero or a 1. Since 210 = 1024, which is about 1000, we can store about three digits (any number between 0 and 999) in ten bits. About how many decimal digits could we store in a five gigabytes of memory? About how many decimal digits could we store in five terabytes of memory? How does this compare to the number 10120? To do this problem it is reasonable to continue to assume that 1024 is about 1000.