Bip39 Implementation. Although it works by using BIP32 process it is possible to continue to import BIP39 seeds into Electrum wallet. Also besides BIp32 there is BIP44 Model which some wallet use for the generation of seeds. The simplest way to store you seed recover phrase is with a Billfodl https://edwinhrcmw.empirewiki.com/8533871/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability