Heh... my first was in 1984, a IIe, with plain 80 column card (the extended 80 had an additional, whopping 64K), a single Disk ][ and controller card, and a Monitor ][ green screen. Hard drives were nearly a thousand bucks back then, so some people opted for no hard drive, or for using the computers at schools if they were hooked to a 5 meg networked Corvus system (and they had a lot of stuff to store).
Quark Engineering, which was later better known as a Mac software company (Quark Express was a publishing package, loved that on the SE/30) built a 10 meg DOS 3.3 hard drive, big, cube, which it cleared out when it dropped its Apple II lines. They also sold a 65802 pin-compatible CPU upgrade kit. The real hard drive revolution for the Apple II was the Sider, a 10 meg which retailed for $695, then 20 meg, which It think sold for the same price but a couple of years on.
This sounds hilarious now -- but it hasn't been that many years before the first terabyte drives arrived, and those retailed for around $500, but they're pretty much given away with a tank of gas now. I remember the ad for the first mass-market 1 gig driives -- ten grand. "Gosh, you could run an entire company on a gig drive," my friend and I mused. The same friend and I were in a Best Buy not that many years ago, and saw what passed fthen or the largest flat screen, also ten grand. One that size is probably $700 now.
That "vintage 1978" Apple II system that was a prop on "The Big Bang Theory" clearly wasn't from 1978, of course, you probably noticed that too. It was obviously from mid-1980s. :^)
-PJ