In the past I can remember when hard drives were in megabytes even on mainframe. We got 80 megabytes hard drives which could store over 750 floppies (you remember those .1 MB flexible drives back in '76 
). Then we started the march upward and onward to a gigabyte of storage in the same 5.25 inch drives. BTW, for the history nuts, the very first gigabyte storage was not in the PC. Where and who first built it in 1980? Change font to see the answer!
1980: IBM introduces the first gigabyte hard drive. It is the size of a refrigerator, weighs about 550 pounds, and costs $40,000.
It was't until 1984, when enhanced IDE was developed by Western Digital that the 548 MB barrier was broken with relative sectors instead of the CCHHR format. Then we see the gigabyte drives soon after. Soon another pioneer in disk technology achieves a density of 1 billion bits per square inch. Who was it?
1996: IBM stores 1 billion bits per square inch on a platter.
Finally fast forward to now and see a full Petabyte of physical storage in this video.
So what would you do with this much disk space???
