In article , Wolf K
wrote:

Sometime in the 1990s I had a true spinner that was about 2" square by
1" thick. Came with a leather case for protection. Can't recall the
capacity. USB. Maxell, IIRC.

that sounds like a compact flash microdrive.

https://en.wikipedia.org/wiki/Microdrive

Long gone into wherever things go that you can't find when you want
them. :-)

i keep a lot of stuff there