File System
A file system is a method and data structure that an operating system uses to control how data is stored and retrieved on a storage device, such as a hard drive or SSD. It organizes files into directories, manages metadata like file names and permissions, and handles operations like reading, writing, and deleting files. Common examples include FAT32, NTFS, ext4, and APFS, which vary in features like journaling, encryption, and compatibility.
Developers should learn about file systems to understand how data persistence works in applications, optimize storage performance, and ensure data integrity across different platforms. This is crucial for tasks like file I/O operations, database management, and system administration, especially when deploying software on various operating systems or handling large datasets.