My first HDD was 10MB, it was a MFM drive. It sounded like some sort of military machinery winding up!
At the time it cost me $1200 - which is about $5000 today. And for the all the time I had it - I never came close to filling it up!
I remember a "Norton" tools program "calibrat.exe" that was used to tune it. and of course X-tree Gold, too. NEC had the best colour monitors at the time - though I only ever had a green monochrome screen - for the longest time.
I remember my first AT (286) was so much bigger than my XT, that I couldn't fit it in my case and so I had the motherboard and cards just sitting in the drawer of my wooden desk.... Ahhh, the good old days....