Bip39 Usdt. Regardless that it uses BIP32 system you can even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There exists BIP44 Model which some wallet use for that technology of seeds. When easy, storing your phrase digitally increases the danger of hacking. Bodily storage is mostly https://techonpage.com/story4119096/dbs-money-value-indicators-on-phrases-with-bit-you-should-know