Security
The security in the file service is controlled by the aliases in the service configuration and Windows permissions.
Aliases
Access to files on local drives and UNC paths is limited by aliases. Only the paths used in aliases can be accessed. This includes any level of subfolders in the specified path.
The request will fail if you try to address a file using the ../ notation.
Windows permissions
The file service runs in a Windows user context where regular file permissions apply. It cannot perform any actions that are not allowed by Windows file permissions.
It is recommended that you check the user assigned to the service and ensure that the file permissions reflect the desired use of the file service.