https://russian.stackexchange.com/questions/14462/what-is-the-difference-between-%D0%BC%D0%BE%D0%B8-%D0%BC%D0%BE%D1%8F-%D0%BC%D0%BE%D0%B9
Мои, моя, мой - are just conjugation of Мое; they are plural, feminine, masculine respectively. A full table of those conjugations you can see wiktionary, мой It is