Gran Turismo 4 Online Public Beta Iso- - Google ((full)) Guide

When the testing period concluded, the servers were shut down. The discs, having served their purpose, became rare collector's items. For years, they were thought to be lost to time—physical media that would eventually degrade or be thrown away. However, the digital age has a way of preserving history.

If you own a physical copy of Gran Turismo 4 (any region), you morally justify the download of the Beta as a "derivative preservation backup." Gran Turismo 4 Online Public Beta Iso- - Google