I entered the computer industry just over 50 years ago, and a purchase I have just made really brings home the scale of change over the years.
In 1966 my employer, Shell Mex and BP, was planning to move from a batch processing Leo 3 system involving the files of some 250,000 customers to a new computer which had direct access storage. In 1967 placed an order for a Univac Computer with FastRand drum drives. Each drive could store 100 megabytes of data and cost about £100,000. It came in a large cabinet and weighed about 2,200 kilo.
This weekend I decided to reorganise all my computer files as part of a move from Windows XP on a rather tired desktop to a laptop under Windows 10. These files include historical archives going back some 25 years, and urgently need restructuring. I purchased a drive big enough to hold all my personal files from several generations of personal computers and separate hard drives. The drive cost about 30,000 times less than a Fastrand (adjusted for rise in cost of living), weights about 100,000 times less, and can contain about 20,000 times more data!