Yes. If I’m not wrong, you can store for 3 days max before putting in the freezer. I normally put in the freezer immediately after pumping (after doing calculations, to see if I have enough milk in the fridge). This is to prevent lipase.
I normally thaw in the fridge. Once thaw, it has to be consumed within 24 hours. Do not refreeze. So when u freeze your bm, I suggest to freeze in small amounts to prevent wastage.
As for your milk supply, if ure still a new mum, don’t stress yourself. It takes about 3-4 months for your supply to be established. Just keep doing what you’re doing, and it’ll increase eventually. During the beginning I also pump about 200++ per day. By 4 months, I’m already pumping 800++ per day. So keep going! Else you might want to consider lactation cookies, or seeing a LC to get help to increase your supply. Or can consider supplementing with formula! My baby is mixed feed as well! Don’t stress yourself!
Mik