To the uninitiated, this sounds like technical jargon. To a retro gamer, it represents the holy grail of convenience—a digital library of nearly every Xbox game, pre-configured to run directly from a custom hard drive without discs.
An (also known as "HDD Rips" or "Extracted Folders") is a collection of original Xbox games that have been extracted from their disc images (ISOs) and organized into folders containing raw game files.