This is pretty cool

I get a 403 error. Any mirrors?

That’s the first time I’ve ever read the measurement “microinches”

Back when things came with real documentation.

It's interesting that the index hole is not on y-axis, if it is actually used to allow operations. I used all my SS 5.25" as DS just by flipping them I think, and they just worked. You weren't supposed to do that, but all the SS diskettes were coated on the other side, so you just fliped it and it would work, but it wouldn't be certified for that use case.

Includes a bit about manufacturing process and disk writing as well. Amazing!

For all of computing eternity, the only person I've ever heard refer to it as a "diskette" is icon-lady Susan Kare.

At 1,685,278 bytes this almost fits on within the hallowed 1.44 megabytes. Maybe the front and rear covers can be discarded?

Just recently I wanted to show my kids the 5.25" floppy disk - I had a small stack somewhere, but could not find it. I have finally found an 3½" floppy and have shown it to my kids (14 y.o. max). Evidently they never used such a thing, but I was genuinely surprised they didn't even know what it was. After a considerable amount of time one of my daughters hesitated but said something like: "Wasn't it like old USB stick thingy?". Given they have no USB stick either that's not bad, I guess. Then I proceeded to explain that a floppy disk is pictured on Save buttons - you just had to see their faces, it was a moment of the big revelation.

such a clean documentation, that's actually inspiring