Past Tense Form of Verb + 後/後で
Noun + の + 後/後で
You use 〜後/後で to express the order of two actions.
Action A + 後/後で+ Action B → means “You need to do Action A before you do Action B”.
Difference between 〜てから and 〜後/後で：
〜てから：the time interval between two actions shouldn’t be too long.
〜後/後で：the time interval between two actions can be short or long.