[QUOTE=Lumpy]
Yeh, WAY back in the IBM PC/ Apple II/ Commodore 64 days, you’d have two external floppy drives (272 K 5 1/2" floppies) connected to your computer by serial cables. Most commonly you’d have either the boot disk in drive A and your application in the B drive, or else the application in A and B would be used for saving and loading data files to the application. Later when hard drives were introduced there was usually just one floppy drive and B was a virtual drive sharing the same physical slot with A, used by DOS as previously described.
And at that I congratulated myself that I’d never had to use a tape cassette drive.
[/QUOTE]
My first computer, bought in 1982, was the Commodore VIC-20 with a vast 5K of RAM! I skipped the 64 and went right to the 128 before building my first 286 PC.
Oh, yeah, that wonderful cassette drive! We called it the “floppy stringy.” It saved data OK, but there was no FAT, so you had to make a note of the counter number where the data was recorded, so later if you wanted to load it, you had to fast forward to that number to find the data.
When I got the 128 I learned CP/M, which was helpful later when had to learn DOS, as the latter was not that much different, and it had a real 5.25" floppy disk, slightly better than the cassette tape. 
The 286 had a 10 MB HDD, which as somebody mentioned, everybody wondered why it was so huge, as it could never be filled up.
And as others have noted, with two A: and B: floppy drives, even when both were 5.25", was great if you knew a few DOS commands such as xcopy, etc.
I was a DOS phreak and held out as long as humanly possible, still using it for many things because it was quicker and easier than the stupid GUIs. Finally got Windows 1.0 which hated, but as the versions came and went, was forced into using it more and more as programs written for Win could not be accessed from DOS.
Ah well, progress, ain’t in wonderful? Now with all the bloatware, most tasks take far longer, use more keystrokes (or mouse clicks) to perform the most simple things, than ever was needed with DOS.
The thing was, all during the 80s decade and into the 90s, everybody who used computers was a fan of them and wanted to learn all they could. If you walked into a computer shop (very rare then), you always had long talks with the staff and any customers about the wonders of computers.
Now, only a small percentage of users are computer phreaks; for the rest, they are just a tool that most of them only tolerate because they are necessary.