When backing up your mnemonic phrase, we strongly endorse employing Actual physical media, which include writing to the mnemonic phrase card or a metallic board including the SafePal Cypher. You may also preserve multiple back-ups of it. This article describes BIP39, the standard that defines how seed phrases are made, https://infopagex.com/story4340519/little-known-facts-about-bip39-words