....Was a Tandy TRSDOS elephant which I guess was about 15" X 18" X 5", weighed in the region of 20Kg and was bought new (but obsolescent) for £2900. It's capacity was 4Mb, had to be switched on one minute before the computer to avoid possible data corruption.
Only 3 years later I bought an IBM PC clone complete with internal 20Mb HD for far less.
The first 'home' computer, Altair 8800, didn't even have a storage device when it first came out (1974). You had to enter everything in machine code via an array of switches on the front, and as soon as you unplugged it you lost everything.
Mind you, all it could do was make lights blink so no great loss I suppose (although the radio signals could play a tune on a radio if it was tuned in to the same frequency).
just what was inside those huge tape storege device cabinets. For no very good reason I always thought they were merely a fancier version of an ordinary reel to reel player, but with some form of stepping motor.
I'm smiling as I type this because I have a mental image of woody allen trying to thread the tape machine in the movie Sleeper.