There are a lot of materials in Floating Island Story, and the backpack is always not enough. You can build a warehouse for storage at night. Here is how to make a warehouse.
Open the menu and click on Equipment-Skills. Unlock the warehouse in the skill;
After the warehouse is unlocked, click on the menu - Economy and see that the warehouse is unlocked. To build a warehouse, you need 3 steel and 10 bricks;
Gather and collect coal and stone to synthesize bricks at the furnace;
Collect iron ore, gold ore, and coal ore. After synthesizing iron ingots and gold ingots at the furnace, they can be combined with coal to synthesize steel;
Select the warehouse in the building and choose the location;
Click the left mouse button to create a warehouse, and once done, you can store things.