He is just a newbie, who as far as I can tell isn't very much competent around crypto. Instead of guiding him best, and suggesting him the practices experts repeatedly put forward, we have OgNasty suggesting to store private key in text file. OP probably doesn't even know why a hardware wallet is considered secure, but established, decade-old user merely recommended him to back it up on a USB, and equate that with writing down on paper. Ridiculous.