Just thinking about that scares me. I've had enough thumb drives randomly fail that I wouldn't rust that for more than 100k sats. I've got one signing wallet @nprofile1q... that requires 2/3 signatures, including hardware signature, on a device that's only brought online to sign transactions, and seperate watch-only wallets on all my other devices. This allows me to safely monitor my wallet, and track incoming transactions without having to bring my signing device online