How to store Banchan?

Fridge is fine. About eating, depends. Some are good cold from the fridge, some are good room temp, some are good hot. Whatever makes you happy.

I am a fan of getting a stainless steel bowl, adding some fresh, hot white rice and anything I find in the fridge. Some sesame oil, some gochujang and/or bibimjang sauce mix with a spoon and eat. A fried egg or two on top if I feel like washing the fry pan.