Bought a new hard drive today; a 1½ terabyte drive for $160.
Thats only 10?¢ per gigabyte!
that says the first hard drive was $10,000 per megabyte!
So over 50 years, the price of hard drive storage has dropped by a factor of a BILLION. At this rate, by the year 2059, the lowest cost of storage should drop from the current cost of $100,000,000 per exabyte to 10¢.