How to import 3D object with hierarchy properly?

Hello,

I have a bad comprehension about import in UE5… i want to import a fbx of objet with a complexe hierarchy (childrens).
So if i import with content browser, UE will create an object for each children and my 3D object is all dismantled.
But if i import into level (in file), my 3D object will be create in my world but not in browser project, i can convert into blueprint but UE will put “defaultSceneRoot” after the name of all children in hierarchy.

I think i do something not properly isn’t it?
If you have some advice, i’ll take it :slight_smile:

Thanks