You are right that it wasn't smuggled out. These are old pre-2003 documents, probably purloined from the IAEA in Vienna. Iran abandoned their nuke program after the USUK dismantled their old anti-Iranian attack dog, Saddam.
Most likely the the folders in Bibi's dog and pony show are empty and the CDs are blank. Next week he'll produce some documents purporting to show that Tehran has been buying yellowcake in Niger.