The Soyuz is not a 'cargo carrier', it is a 'people carrier'. It does have a service module that can carry a very small amount of cargo on the way up, but that

The Soyuz is not a 'cargo carrier', it is a 'people carrier'. It does have a service module that can carry a very small amount of cargo on the way up, but that gets ditched and burn up on the way down. The return capsule just carries the astronauts and personal effects (and it's a tight fit at that).