Sounds like atop is exactly what you need.

One problem with that is that you will end up with two EFI partitions. This is not supported very well by anything, really, so you will run the risk of Windows messing with the wrong partition anyway.

Edit: it appears the PWA support in Firefox is not ideal, see responses to this comment.

Chromium is not an offshoot of Chrome, it’s more of a precursor to Chrome, and it is completely controlled by Google. As such, it will also drop support for extensions that do not support Manifest v3.

If you want to enable PWA support in Firefox, it looks like this is possible (however the experience doesn’t seem to be great, see responses to this comment): https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Guides/Installing

For other browser suggestions see, e.g. https://www.xda-developers.com/4-browsers-manifest-v2-ublock-origin/

“take a decision” is also a valid phrase: https://www.merriam-webster.com/dictionary/take a decision

I’m not sure what a “music jukebox” is, and how it’s different from a music player, but I would recommend to try mpd. It should work with your collection, although I don’t have personal experience with collections of this size. Some clients might also not have been designed to work with such collections, so probably you’d have to try several.

This seems to be an encrypted file: https://stackoverflow.com/questions/47712102/sd-card-files-with-encrypted-data-console-text-in-it-how-to-get-my-files-bac

I would try magick identify from imagemagick. If that doesn’t work, I would try strings just to see if it has any metadata at all. Cameras usually store their model name somewhere.