We have a file server with personal folders for each user, mapped as a drive ("P:\>" as in "Personal" drive), for each user. There are also folders for each department that are shared by all members of said department, and also mapped as drives ("R":\>" for dept drive) for each user within that department.
The users that have permission to the folder, as a mapped drive, can see, open & change the files, but can not save them back into the folder they found the file in. the error..is "Access denied" with the generic MS comment of please make sure the drive is not full ...etc.
I have moved the files across a partition onto another server, (which, in theory should have stripped off the permissions in NTFS drives) I deleted the folder the files originally resided in and created a new folder. I first assigned the "Share" and gave the 2 users full access to the files & folders. I then assigned the security the same way on the "Root" folder (R:\>Marketing) I then set "Inherit permissions....." on the security tab. Last, I moved the files & folders back into the File server (R:\Marketing) folder. We had the same problem???
There are dozens of folders in the root of that "Data drive" that are shared and all shares work fine.
So, hundreds of folders with thousands of files permissions are fine on the same drive, just not this folder.