The food bags I keep in the house.
When I need food I have food grade buckets that I put it in and seal it with a lid in the garage. So far we have not had any rodent problems to the point of getting in the house or into the bins in the garage.
My plan for once we have a shed for animals is to use steel garbage cans with the feed in it but I do like the idea of old fridges or freezers, they are generally free, they do have seals that the mice can eat through though.