A recent news story reported that
a woman took out the trash, including a USB drive containing hundreds of bitcoins (although the veracity of this news hasn't been confirmed). This made me want to start a topic about the importance and necessity of backup redundancy:
If you have one, you have none.
When creating your wallet, it's important to write down your seed phrase correctly and store it in a safe place, but you should make more copies. keep in mind that anyone who has your seed phrase can steal your funds. So I recommend using type of additional protection, such as a BIP39 passphrase. Keep in mind that this is an advanced feature and requires a basic understanding of wallets. I recommend reading this article for a clearer explanation of the passphrase and how it works:
10 Common FAQs Around Passphrases in Trezor WalletsAlthough some people advise against it, I support encrypted digital backups. Wallets like Bitcoin Core, Sparrow and Electrum allow you to export a keystore containing the wallet's master private key, which is encrypted with your password at the time of encryption. However, always write down the seed phrase (Bitcoin Core doesn't have a seed phrase) as well.
Test your backups, whether through the seed phrase or encrypted backups, to ensure everything has been done correctly.You can optionally encrypt the seed phrase (do this in an offline, air-gapped environment) using PGP, offline password managers (always offline and open source, like keepass), Veracrypt, Pipocrypt, 7zip, AES (Linux itself already has built-in support) etc. This way, you can make several copies in different locations since the file is password-protected (make sure to create a strong password). It's also essential to store the password securely.
There are several ways to encrypt your backup and other backup methods that provide plausible deniability.
I recommend reading this article, which covers some of the options suggested in this topic, including what to do/not do to have a secure backup:
How to Back Up a Seed Phrase
Which of these backup methods is most efficient for your use case?