food storage

I’m switching my goffins cockatoo and sun conure from Zupreem to Roudybush maintenance. Just got a 10 pounds plastic bag from Amazon. Should I store the whole bag in the refrigerator?

I always throw the new bags of seed mix in the freezer for a couple hours. Is that long enough, or should I leave them overnight? Does anyone freeze their pellets? Also, I always store the seed mix and pellets in airtight, Tupperware-like containers under the cages... Is that alright or...