You can upgrade the Barn to get more space.
1. Open the Barn and Tap Upgrade at the bottom.
2. Collect the tools required for upgrade: screwdrivers, hammers and wood.
3. Tap Upgrade.
You can also sell goods right from the Barn to free up space.
1. Tap on the item you want to sell and tap Sell.
2. Select the required quantity and price in the window that appears.
3. Tap Put on Sale.