Yes, ALWAYS backup your data (personal data, program settings, passwords, bookmarks, etc.) before doing a "big" upgrade like this.

Is there a way to move the "metro apps" around (I'd like to put them in a folder) ?

Same here, I don't use a microsoft account. I upgraded then checked it was activated properly, then installed from scratch using the bootable distribution made with windows 10 media creation tool,...

I like both very thin chiclet type keyboards and mechanical keyboards (kind of the two extremes).

The two keyboards I have and am very happy with, have a good type feeling with (and therefore...