FYI regarding backups. Files written to most flash memory will go blank in 10-15 years.

The charge used to write to the cells leaks away over time. That wallet.dat file will be corrupted or just gone. This can be negated by rewriting the files every few years (even right back to the same media), but I would suggest BIP39 stamped into stainless steel for safer long term storage. SLC flash is the longest lasting if you do want to use flash.