Rockstar has advised a fan on Twitter not to install the "play" disc of the game.
GTA V ships on two discs on Xbox 360, the first of which, the "install" disc, is the only one required to be installed. The installation weighs in at just over 7GB. Some fans were expecting to also install the second disc for better performance, but apparently that's not the case.
The publisher said to expect more details at launch.
GTA V finally launches tomorrow on Xbox 360 and PS3, be sure check all the review scores here.