The file system is the contents of the notepad, and the file is the word. For hard disks in a PC at the moment, two file systems are most common: FAT or NTFS. First FAT (FAT16) appeared, then FAT32, and then NTFS.
This article describes an instrument that is designed to manage FAT file systems for learning, retrieval, recovery, recovery and forensics. Currently it supports FAT12, FAT16 and FAT32.
You can brush up on how to build fatcat, as well as using fatcat. At the same time, you can use fatcat for hacking the FAT file system.