CREATION OR MANIFESTATION ?

Did God creat the Universe ; or God, Himself /Herseself or Itself manifested within the Manifestation ?

If God created the Universe, where was God residing before the creation ?

Bharatya(Indian) Spiritual Philosophy(Upanishat) expounds that this Universe is but the Manifestation of the Divine, like a spider that spreads out a net out of itself.

For creation one has to get matter from outside. If it is a creation, , then where was that 'Out-side ' source for God ?