Where is the index of files on a disk?

The index of files on a disk, commonly referred to as the file allocation table (FAT) or the master file table (MFT) in NTFS systems, is typically stored in a reserved area of the disk. This index keeps track of the locations and attributes of files, allowing the operating system to efficiently manage data retrieval and storage. It is crucial for organizing the file system and ensuring quick access to files. This index is often located at specific sectors on the disk, depending on the file system being used.