File System
In plain terms
How an OS organizes and stores files on storage.
Going deeper
A file system structures data into files and directories on disk, managing storage, naming, and access. It turns raw storage into usable files.
Under the hood
Different file systems (ext4, NTFS, APFS) trade journaling, performance, and features; inodes track metadata.
Examples
ext4, NTFS, APFS, directories, mounting, storage organization.
Think of it like...
Like a library's cataloging system organizing how books are stored and found.