This book explains the fundamental concepts and the basic knowledge of file systems, hard disks and data recovery, and the usage of virtual hard disk tools and disk editing software like WinHex; it expounds in details on the management of MBR partitions and GPT partitions, the overall layout of FAT32 and NTFS file system, the management of FAT32 files and folders, the role of NTFS metafiles, the management of NTFS index catalogs, etc.; and explicates with detailed cases the basic ideas, methods and steps of data recovery. This book has been recommended because of its richness in the content, its focusing on the subject, and its easy readability.