First hard drive we had as a family was an RLL 30 MB Drive. My first computer (286) had a 40MB HD that had to be partitioned. I think the first drive I personally bought was either a 120 MB or a 500 MB IDE hard drive. I remember that it cost me $500 for that hard drive.
Of course one of the things I loved about DOS in those days was that it was pretty easy to swap drives around. Put one in, copy files, SYS the drive, swap positions and possibly jumpers. Tried something similar with XP and found that it had remembered all of the drive letters which led to some very interesting times of registry hacking.
And if I win, I'm pretty sure this drive is headed for an external enclosure. I don't think my current setup could handle it without buying a new card.