Though I started with a 5.25" single-sided single density floppy in 1978: 88 Kilobytes.
I actually upgraded to the 8" floppies about 4 years later, but by then it was double-sided, double density. I thought all my Christmasses had come at once to jump from 88 K to 1200 K in the blink of a eye. I transferred a whole 5" floppy to an 8" floppy and I still had more than a Megabyte of space left! Wheeeee!
Round about then the first IBM came out, and I remember we looked down our noses at that miserable little amount of floppy space it had (160K) and we considered it a toy!
We didn't think that way only 3 or 4 years later when that "toy" completely wiped out our 8-bit world.