sung, I usually use the gerber breast therapy pack to encourage let-down first. Only when I see droplets then I start to slowly squeeze my breast. I'll squeeze for about 35-40 mins for both breasts before using my freestyle for about 10 mins more. Will usually obtain 100+ml via manual expression, and aft pumping, will obtain around 200ml in total. For me, when I first hand-express, I can only squeeze 50ml in total. Then I realise that let-down is impt, if not, when you squeeze when you're not ready, it'll get quite painful. Also, when you press on lumps (if you have), also painful, but this helps to clear any blocked ducts. Have to push right from the breast (next to the armpit) towards your nipple. Only when you feel your breasts are soft, means you have quite emptied it and can use your pump to get more milk. In fact, aft pumping, I can usually squeeze some more milk as pump cannot clear breasts thoroughly.