When backing up your mnemonic phrase, we strongly propose making use of Bodily media, like writing over the mnemonic phrase card or possibly a metallic board such as the SafePal Cypher. You may as well retain several back-ups of it. - Lưu trữ Seed Phrase trên thiết bị điện tử: https://hyperbookmarks.com/story18945536/the-basic-principles-of-bip39-passphrase-generator