Comparison between “Head Disk Assembly” (HDA) from an IBM 3380 Model J storage device from the 80s and an SD card that we carry today
"Underscoring the dramatic pace of development in the storage industry, IBM introduced the world's first gigabyte-capacity disk drive, the 3380, in 1980. It was the size of a refrigerator, weighed 550 pounds (about 250 kg) and cost $40,000"