Data storage like processing power of PC and mobiles has progressed rapidly while cost per unit of capacity and power have increased massively. The photo shows the change for portable storage – if you count putting a massive core memory bank into a plane portable.
All this however pails into insignificance compared to the human brain. The brain is said to have the equivalent of 256 billion GB so you would need 4 billion of the 64 GB SanDisk micro SDXC cards to equal the brain’s capacity.