Hey @Liz_Ziser,
Asana2Go also offers reporting features: Asana2Go: Copy, export, and print from Asana flexibly (Free for most users/companies)
Bridge24 offers reporting and export functionality too: Bridge24 + Asana • Asana
Or maybe this helps: Export All Data from Asana - #9 by Pawel_Swiderski
You might be able to achieve such big export with one of these programs.