Storage - The Barn and Granary

Quite early in the game you will need to think about increasing the storage levels of both the barn and granary. This can be done using resources - as long as you have the right ones. So tap on either the barn or granary, then tap 'increase storage' and see what is needed for that particular upgrade. If you don't have it, work out how to produce it, or you may need a particular item which is not unlocked until later levels in the game.