This May 27, 2017, notice from the NSC was in response to the Judicial Watch request dated Aril 4, 2017. This was Trump’s NSC.
Also, the Obama Library does not physically exist yet. It has not been built yet.
So where are these documents and who is holding them?
The deadline was April 4. The begin date was in January before the inauguration. We don not know when the documents were moved or by who.