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The core of your wallet security is the seed phrase—also called seed words—a series of 12 or 24 words that act as the master password to your Bitcoin holdings. The device will prompt you to choose between 12 and 24 seed words; for simplicity and security, 12 is often sufficient for most users.
Once selected, the MK4 displays each seed word sequentially. You must carefully write down these words in order on your backup paper or metal plate. Never store these words digitally or share them via email or unsecured channels, as anyone with access to them can control your funds.
Pro Tip: Some users prefer stamping seed words onto a metal plate for added durability and fire resistance.