Ressource are black and don't show shadow

As the title said
For some reason my Unity Show my ressources as black and it's like impossible to me to see the shadow like the tutorial "rolling ball".
The picture will pretty much explain what I mean...

Spoiler: In tutorial example

Spoiler: My Editor error

As you can see instead of being white it's just black or transparent...
Did they have way's for changing this?
Did I done something wrong? Or bad setup my Unity?
It's was like that when I first created a project.

Thanks for any answer
Nio Kasgami

 

Do you have a light source...in your scene..?

 

I just add one a directionnal light I noticed that after and this kinda fixed the stuff but kinda the shadow still not cast :/ sorry for being noob...

EDIT : oh the light was not casting shadow!

sorry for being so stupid ._."

 

No..problem we all were there...at some time.... long ...long ...ago ...in.. a Galaxy...Far... oh O.K ...nuff that...
Glad to help..

EDIT: ..oh and your not stupid...your learning...
Lar