Apple had a 5MB Corvus hard drive for its Apple II product just prior to the IBM PC launch in 1980 featuring 2 5 1/4" floppy drives
IBM (daisywriter), Apple (Lisa) and Xerox (Star Workstation) had word processing units that featured 8" floppy drives in 1982, and later got harr dirves. Those were rremarkable only because computer networking over long distances was starting to really take off. I worked on state-of-the-art x.25 units I supported for Xerox in that period, and DARPANet, ArPANet (grandfather and father of today's Internet) were begin used. We though 110 baud being compressed to 2400 baud was something special. Everything was text based or line art, then. Xerox and Apple figured out ways of putting placeholders in documents that could position clip-art.
Xeorx had a PC runnig both a CPM boot from a Z80 chip and a DOS boot from an 8086 chip called the 16.8 that ran on a 5.25" flopp then a 10MB hard drive and couple process information simultaneously on both CPUs.
Apple's Corvus drive was revolutionary because the only "large capacity" data storage media at the time was the trS-80 cassette tape drive. The Apple II went from an 8" to 5.25" dual floppy system in the late 70s and early 80s. The Corvus drive sold for $500, I believe.
Storage took a leap of doubling storage capacity for a few years, and Seagate launched a 5.25 " full height format 80MB ST4096 drive that during times of shortage sold for 1,100 wholesale
About that time we saw floppy format changing to a 3/5" 360k ad 720k (double capacity) floppy disk.
Hard drives also began changing to half height formats, and then the luggable Kaypro and Compaq all-in-one computers with those infernally tiny green screens started hitting the market. Most of these had dual floppy drives, and a 10MB or 20MB half height hard drive.
Western Digital went from making drive controller cards to drive manufacturer. Seagate bought Conner to develop 2.5" hard drives, and portable computing started to really take off, because now they didn't weigh 40+ lbs. Grid started the move with a $2,000 orange plasma portable that you carried an d plugged in.
All that, from my memory occurred in the years between 1978 - 1987 or so.
I currently have an archive with more than 13TB of hard drive data stored. Every year or so I have to migrate data from the older media to keep up, but the costs are much cheaper now.
(Or better yet, get Windows Home Server.) 
