As time goes, when your researches have reach the cost of few Billions, it is headache to keep up , as your main storage limit is about 2Billions.
So, what you can do is:
-
Keep your resources at nearby palace and stored until the required amount is met then you use carriages (legion -lead by carrier champs) to deliver back to main town.
-
Assign a high load talent champs or high attributes champs such as >> full intelligence legacies chengyu can reach about 200% which will increases x2 of 2B, so total around 6B resources storage capacity.