Breastfeeding my 4 weeks old, when do i pump?

constanza

If i want to start saving some milk for when i am away from baby, when is the best time to pump? Right after she feeds? In between feedings? (She eats about every 4 hrs)

if a i pump, and she wants to feed 30 min later will i have milk for her? (Pic because she is too cute and turned 1 mo yesterday!)