The PS4 and Xbox One will not support external hard drives at the time of their release, but will launch with 500GB of space.
According to ExtremeTech, the PS4's drive will be user upgradable while the Xbox One's will not. Also, while both support USB 3.0 ports, they will not be able to have the hard drives attached through that method.
Microsoft's Larry Hryb said the company was "working on other things" when asked about the hard drive dilemma at the Penny Arcade Expo.
Sony's Shuhei Yoshida was asked about their hard drive system by a Twiiter user who Tweeted, " Can we use external hard drive to install games without having it on the main internal hard drive?" to which the executive responded, " No."
The impact of a non-upgradable hard drive will likely not bother gamers for a few months of years because off the large size of the 500 GB, but perhaps in the future, and as the consoles become functional for other things, the companies will have to address it.
Sony and Microsoft unveiled their list of games at the PAX video game event earlier two weeks ago, and the list of games for the PS4 and the Xbox One is pretty similar.
Sony announced 33 titles to Microsoft's 23, and is offering more exclusive games.
PS4 games announced according to Forbes are: Assassin's Creed Black Flag, Battlefield 4, Call of Duty: Ghosts, Driveclub, FIFA 14, Just Dance 2014, Killzone: Shadow Fall, Knack, LEGO Marvel Super Heroes, Madden NFL 25, NBA 2K14, NBA LIVE, Need for Speed: Rivals, Skylanders: Swap Force, and Watch Dogs.
The Xbox One Day one games include: Assassin's Creed IV Black Flag, Battlefield 4, Call of Duty: Ghosts, Crimson Dragon, Dead Rising 3, FIFA 14, Fighter Within, Forza Motorsport 5, Just Dance 2014, Killer Instinct, LEGO Marvel Super Heroes, Lococycle, Madden NFL 25, NBA 2K14, NBA LIVE 14, Need for Speed: Rivals, Peggle 2, Powerstar Golf, Ryse: Son of Rome, Skylanders: Swap Force, Watch Dogs, Zoo Tycoon, and Zumba Fitness: World Party.
The Xbox One will be launch on November 22 and the PS4 will launch on November 15.