Start with a kickoff article like this. Look for links inline.
http://en.wikipedia.org/wiki/History_of_computing_hardware
There is some stuff here on IBM storage devices. For
example, 1965 was about 7.25MB. But that is for mainframes.
http://en.wikipedia.org/wiki/IBM_350#IBM_350
I think in 1982 or so, I might have had a 10MB drive, which
was full height. Not nearly as slim as modern drives.
Sort of like the item in this project. So this
is personal computing. I was able to store 2 years
of work on that drive, because most of what we did
could be stored as small text files.
http://www.swtpc.com/mholley/SASI/SASI_Hard_Drive.htm
Paul