The policy engine ignores files in the Windows system folder and other system files in the root folder, such as the System Volume Information and Recycling Bin folders. The system files are not moved.
The policy engine also ignores files with the following file attributes:
System: The file is part of the operating system, or is used exclusively by it.
Device: The file is reserved for system use. It indicates the file is an interface for a device driver for peripheral devices, such as printers (PRN) and serial ports (COM).
Encrypted: The folder or file is encrypted by the NTFS Encrypting File System (EFS). For a file, this means that all data in the file is encrypted. For a folder, this means that encryption is the default for newly created files and subdirectories.
Offline: The data of the file is not immediately available. This attribute indicates that the file data has been physically moved to offline storage, such as by hierarchical storage management (HSM) software.
Temporary: The file is being used for temporary storage. File systems attempt to keep all of the data in memory for quicker access rather than flushing the data back to mass storage. A temporary file is usually deleted by the application as soon as it is no longer needed.