Consider the Ledger and Trezor hardware wallets: how long could they last in a typical bank safety deposit box?
If the answer needs specifics, assume the following:
- Temp: 20C
- Humidity: 50% RH
- Altitude: sea level
- Vibration/shock: none
- Cosmic radiation: whatever would get through to a typical safety deposit box (should I choose a box nearer to the floor assuming there's no risk of flood?)
- "last" = 999 of 1000 wallets stored would have full functionality after this period
To help me understand more, in your answer, could you explain why hardware wallet data retention is longer (if it is) than, say, a typical USB stick, a typical SSD, and an IronKey.