The answer
Two copies in one building reduce the risk of losing one copy but not shared risks such as fire, flooding, burglary or a household move.
What to do next
Use separate secure locations and a recovery procedure that a trusted heir can understand. Do not sacrifice secrecy by leaving an unprotected phrase in multiple accessible places.
Trezor hardware wallets
Hardware wallet or backup product relevant to a self-custody question. Availability, supported assets and local eligibility must be checked before signing up or buying.
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Frequently asked questions
Would a second device eliminate the need for seed backups?
No. Two devices can share one failure point if both rely on a single lost backup or passphrase.