I kept copying a file to a file share. It would start to copy then it would say Access Denied. Wait what? I'm a domain admin. I did the following and it seemed to fix the problem.
Administrators -> Full Control
Domain Admins -> Full Control
My Domain Admin Account -> Full Control
I added the following:
Everyone - Then check the following:
Traverse folder / execute file
List folder / read data
Read extended attributes
I then added:
CREATOR OWNER - Full Control
I copied the file to the shared drive again. No error!