How can i Instantiate gameobject in array

I want to add to array an instance of gameobject in my resources folder. I do it like this:

 Invg [i] = Resources.Load (grabbed.name) as GameObject;

but then , when i change some in Inv[i] gameobject that henges applied to prefab in resources folder. I Do not want it this way. When i use Instantiate() :

 Invg [i] = Instantiate (Resources.Load (grabbed.name) as GameObject);

but this code instantiates gameobject not only in array but on the scene too in random position. What shold i change in code?