from The Conservative Treehouse:
“Hoffman Estates” is a Chicago area location containing an abandoned furniture store and warehouse. The Obama Foundation leased, then re-upped the lease, to use the facility to store all the paper documents from the Obama administration {Location Link}.
The Obama administration told the National Archives and Records Administration (NARA) they were going to upload the documents into a digital form for use in the Obama library. The paper documents were, still are, held at the Hoffman Estate warehouse while this digitization process took place. It should be noted, the Obama Foundation has never digitized the records, hence they renewed the warehouse lease.