Hello,
I would be happy to help. 
It looks as though the deck owner opted to include their media as a separate folder, for whatever reason/s:
You might try to follow that link, and/or to contact the deck owner, to see about alternate methods of obtaining the media they have chosen to include separately
That being said, this looks to be an ongoing issue with the deck, unfortunately: [Wiki] Ankisthesia by Ankisthesia - #27 by RocRoyalty?
Please let me know if that answers your question, and if there’s anything else I can help with.