Select one of the following OS choices: real-time system, the Linux operating system, Windows, or Mac OS X. Draft the File System section, a file system includes the methods and data structures that an operating system uses to keep track of files on a disk or partition. You may need to research the partition or disk that is used to store the files or the type of the file system in that operating system. Remember to properly cite all references. To complete this assignment, you must address the following critical elements related to the file system of your chosen OS: Describe the file structure of the operating system. Describe the file type used in the operating system. Describe the file access mechanisms used in the operating system including program threats, system threats, user authentication, user permissions, and virus protection.