Video on a smart phone here so I can recall the sound as well as how I achieved it (e.g. chord shapes, fingerings, pedal settings).
In the olden days, I used a SOS reel deck and after that a Tascam 4 track cassette. I still have the tapes but no machines to use.
I found a few I’d copied to normal cassette, but in hindsight very little of what I thought was interesting was not worth saving. Still, it’s fun to listen to some sounds now from 40-50 years ago to reflect on how things changed. Kinda like looking at old photos.
Digital media has its pitfalls, too. I’ve lost hundreds of files to format obsolescence, disk crashes, etc. I guess for me this kind of thing is more useful on the short term.