You can upgrade your Barn/Silo to expand its capacity.
1. Tap Upgrade at the bottom of the Barn/Silo window.
2. Collect required Materials, make required Tools or buy them for Rubies.
3. Tap the "Increase capacity to …" button.
You can also sell unwanted items directly from your Barn/Silo to make room for new ones.
1. Go to the Market Stand and tap it.
2. Tap a Market Tray.
3. Choose items you want to sell and set its price and quantity.
4. Tap Sell