An ADF (Amiga Disk File) is a disk image file format commonly used to store the contents of floppy disks from Amiga computers. It's essentially a bit-for-bit copy of the original floppy disk, preserving the data, file system structure, and any boot sectors. ADF files are primarily used for archiving Amiga software, games, and data, allowing users to run these programs on emulators or transfer them back to real Amiga hardware using specialized hardware and software. The ADF format is a standard way to distribute and preserve Amiga software, ensuring that the original data is accurately represented. Due to the age of the Amiga platform, ADF files are often encountered in retro gaming and computing communities. They are a crucial part of preserving the legacy of Amiga software and making it accessible to modern users.