Bip39. First and foremost you need to store it Individually from the seed. Acquiring your seed along with your passphrase in precisely the same area defeats the objective of possessing a passphrase to start with. Entropy is a sophisticated element. Your mnemonic may be insecure if this aspect is used https://kingbookmark.com/story18740385/bip39-wallets-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase