Big bag or bulk bag filling systems, especially suitable for packaging potting soil, pet food, granules, etc. To be able to fill a big bag, different dosing systems are used, both on weight and volume dosages. The big bag filling system can be implemented with a net dosage. The big bag is then unloaded from a weighing bunker. A net dosing unit is often used for filling granules in a big bag. With a gross dosage, the big bag is hung directly on a weighing frame, and the product and the big bag are weighed together.