Also: Can weed buds in an air-proof packaging stay fresh for a year or so?
Store them in a glass jar, preferably with rubber airtight seal. Choose a a size so that it doesn’t take more than 2/3 of jar volume. It can be dark glass but you still should keep it away from sunlight. Drop Boveda 62% humidity control pack into that jar, check it every couple of months and it should last for even longer than that.