A File System is a method and data structure that an operating system uses to manage files on a disk or partition. It provides a way to store, retrieve, and organize data efficiently, allowing users to create, delete, and manipulate files and directories. Different types of file systems, such as NTFS, FAT32, and ext4, offer various features and performance characteristics suited for different use cases. File systems play a crucial role in ensuring data integrity and security. They manage how data is stored and accessed, enabling users to navigate through their files easily. Understanding file systems is essential for optimizing storage solutions and ensuring efficient data management in both personal and enterprise environments.