Antwort auf: Heißt es „meine Schlüssel meine Krypto“?
There are many ways to come up with your own entropy with dice, cards, coin flips etc to create your mnemonic if you do not want to trust in computerised pseudo randomness.
Then you take that „existing wallet account“ and import it into the hardware wallet, and whatever software wallet client you want to use with it (without the private keys of course, just pubkeys and addresses like a watch only wallet)