I am 74 also.
5 incn floppies were 128k, PC's later wrote on both sides of the 5 inch floppy making them 256k.
The 3.5 inch floppies in the hard case were 400k then Apple upped them to 800k. I think they were advanced to 1.4 meg later.
To think that we used to run a Mac on a 400k floppy that held the operating system, MacWrite and MacPaint with room left over to hold all your documents.
I think there were 8086 and 8088 chips before the 286 and 386. </C>
I’m not 74 but I remember that stuff and had a lot of it.
I was cleaning up before Christmas and I found a 286 processor, which is now sitting on my dresser.
I built my first machine from a kit in ‘76. It had a Z-80 and 26k or ram. Cost me more than I want to say. An 8k memory card cost me $440, I believe.