File system

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A file system is a method to create a structure for storing files/folders on a hard disk. Common file systems include FAT32, NTFS and ext3.

Structure

The structure of a basic file system is like this:

  • The header: The header allows information about the file system to be stored.
  • File entries: File entries tell information about a certain file, including creation date, size and any permissions it may have.

More complex file systems may include journals and ACLs.