Preeti should search for a webinar on HFS (Hierarchical File System). HFS is a file system developed by Apple for use on their computers. Understanding HFS and its variations (like HFS+) will provide her with relevant insights into the file management system used by Mac.
NTFS and FAT32 are file systems typically associated with Windows, while MS-DOS is an older operating system that also used its own file system. Thus, HFS would be the most applicable choice for Mac users.