If the information in that folder is subject to being audited, there is little justification to have access restricted. Asking questions is not as good or thorough as reviewing actual documents. There is much to be gained from seeing the additional notes and notations as well as documents you may not have expected to see, and you wouldn't know what to ask unless you can see them.
THAT is transparency. Good luck with your continued access.
The only stipulation I ever had was some board documents I looked at in the President's office.
My opinions are not necessarily my employers.
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell