How to pump breast milk and store them?

This is what I did for mine. Just nice supply for the day - Pump into bottle directly > store in fridge > warm up directly. Oversupply - Pump into bottle > transfer to storage bag > freeze. I usually just freeze max 100ml each bags, regardless lesser than that (because I know it exceeds baby’s daily intake) I don’t like to wait till end of day to combine. The longer it is stored out of freezer, the stronger the smell as well. To defrost frozen bm (start with the oldest milk) 1) Bring down the night before, let it thaw in fridge. Transfer to bottle, put in warmer. 2) Thaw under running water, transfer to bottle, put in warmer. Wash Take out all the parts (including flange inserts), wash like how you wash your bottles. It’s up to your own preference, some people don’t have time so they pump and store the pump parts in the fridge (put in ziplock) to use for another 1-2 more pump sessions. I have 2 to rotate so I wash after every use then pop in the sterilizer. Hope this helps!