I used Borg to backup a bunch of dev servers a few years ago, about 5TB from several dozen hosts, over several years. It worked flawlessly, and its dedupe is downright magical.
The restore workflow, where you just mount a snapshot and copy what you need, is fantastic. Very straightforward and reliable.
This might fit your requirements:
https://www.keychron.com/collections/low-profile-keyboard-collection/products/keychron-k15-pro-alice-layout-qmk-via-wireless-custom-mechanical-keyboard?variant=40568767610969