Medium Cargo Container
Medium Cargo Container, for storing items. A medium cargo container is 3x3x3 small blocks. It has two large conveyor ports on opposite sides and two small conveyor ports on the centers of opposite sides. It can be placed so that the large conveyor ports are on the front and back sides, the small conveyor ports are on the left and right sides, and the top and bottom have no ports.
For a small ship, the cargo capacity is 8000 L. Compared to the small cargo container, it holds about 2.37 times the storage per block (calculated as total cargo capacity divided by total volume in blocks = 8000L/(3*3*3) = 296.296 L capacity in each small block).
In other words: if you had 27 small cargo containers, they only hold 125*27 = 3375 L of stuff, compared to the Medium cargo container at 8000 L.