Simultaneously store 2,000 fuel, 2,000 wood, 500 stone, 500 iron, 200 tools, 200 coats, and 30,000 food.
A straightforward achievement that will come once you're producing a surplus of each item.
Tips
This achievement counts if the items are in multiple storage buildings.
Any type of each item will count - e.g. iron tools and steel tools will both count towards the target.