BeginnerSurvival
How to make a Copper Golem and sort items with it
It ignores Barrels, Ender Chests, Shulker Boxes, the Minecart with Chest and items lying on the ground.
Tested 26.3
Item
Minecart with Chest item in Minecraft
The Minecart with Chest holds 27 stacks like a chest, and mineshafts hide loot in them. It is a Minecart carrying a block, which rolls on rails like any cart.
It is made with the Crafting Table from Chest and Minecart.
What it does
Most of these carts are crafted by combining a minecart with their block, and breaking one drops the cart and the block separately. They cannot carry a passenger, but they can be pushed by other carts and sent through powered and detector rails.
On an Activator Rail, each cart reacts in its own way, which is the basis of many rail-based machines.
How to craft
Crafting table Any arrangement Also in the 2×2 inventory grid 
Chest + Minecart → Minecart with Chest
// Slots with several items cycle through every accepted option.
How Minecart with Chest connects
5 links · from the 26.3 game dataTutorials with Minecart with Chest (1)
Minecart with Chest · FAQ
How do you get Minecart with Chest in Minecraft?
At the Crafting Table: 1 × Chest and 1 × Minecart give 1 × Minecart with Chest.
What is Minecart with Chest used for in Minecraft?
It is a minecart that carries a working block along the rails.
Does Minecart with Chest stack?
No: only one per inventory slot.