Tree textures and properites don't follow in prefab

I’m bulding a golf course in Unity 5.2.3, and I’m trying to create a birch tree. I have all the textures and all. Just to test things out I created a tree and assigned textures of some conifer tree or summet but that doesn’t matter. I was eager to test how the tree would work in the game. Some courses I played it seems like 2 feet from the leaves ball goes “DOING!” as it hit the trunk and goes about. Some courses has “proper” trees where it rustles in the tree and ball acts accordingly.

I made an premade of the tree (not sure if it was properly made, I thought like a premade contained all necessary things, so I probably made an error here)

And then I dragged the premade into my “golf project” and here’s what it ended up with:

I have no idea how it “grabbed” the texture folder along with it. But as you guys see, there are no textures. but as you also see there is a texture folder with them.

I’ve heard of some bugs on the tree-maker in Unity 5, so that’s why I have, not once, but 5 times had to drag the bark material to the trunk of the tree…

I think the game, or at least I hope, takes care of the colliders for the leaves and the trunk separately.

Hmm ye… so how can I “package” it all in a prefab? Not sure how that works but ye, it sounds like its a lovely kinda like zip-file where everything needed is contained. But ye… Unity 5 has some issues…

I would love to use Blender and addons for it to create trees… some amazing ones for it… but I need somewhat low-poly ones…

And most importantly that Perfect Golf game recognize bark as bark, and leaves as leaves…

But first…

In hierarchy… do I drag all the textures and shit there or? I created a prefab in the project window and dragged stuff there… didn’t work to well…

Any pointers?

Have you tried this on a recent version of Unity?

Sadly I must use 5.2.3 since the golf game requires courses to be built by it.