Cant import files

I tried downloading some assets from I downloaded them as a .zip and then extracted them to my documents. When I tried importing a 3D crate it was 2D for some reason. When I extracted the crate file it made 1 texture file and 3 blend files but only the texture file shows up when im trying to import it from Unreal Engine 4 and when I import it its 2D. How do I import assests from

you need the model in .fbx / .obj format.
Are you changing the import settings?