The Wooden Crate provides a storage block with one more row (nine more slots) in it than a Vanilla Chest.
The recipe requires 4 Wood Blocks, 4 Sticks and 1 Chest
When the Wooden Crate is broken it drops itself and all the items it contains separately.
Unlike with Vanilla Chests, two Wooden Crates placed side by side do not unite into a single multi-block chest. However, you can place as many Wooden Crates together as you wish. It is also possible to sneak click and place a Vanilla Sign or Vanilla Item Frame on the side of a Wooden Crate. The Wooden Crate renders as a full block making it effectively a building block.