I need to model a building with 25 stories. But most of them are equal. So if a change one of them the others should change too. What is the best way to do it, since a copy of the main story didn't update.
This one should be the main story and the other the instance.
Make your floor plan a hotlink module, and if you have repetitive units in the floor plan, make the unit a hotlink module, this works great if you have to make any changes, this changes will be done in all of the stories.