官方有個 Ultimate FAQ (US)，很多答案已有，
有興趣可以看看，當然 US 的資料可能同其他國家的有分別：
http://blog.us.playstation.com/2013/...north-america/
Will users be able to replace PS4’s stock 500GB hard drive? What hard drive sizes are supported?
PS4 owners
will be able to replace PS4’s standard hard drive. PS4’s hard drive is used to store downloaded game and video content, game save files, gameplay movies and images, and more.
What type of hard drive does PS4 use?
PS4 is equipped with a
5400 RPM SATA II hard drive. Users can choose to install a new hard drive so long as it complies with these standards, is no thicker than
9.5mm, and is larger than
160GB.
Will users be able to connect an external hard drive to expand storage on PS4?
No, this feature is not supported on PS4.
Will I be able to watch Blu-ray movies on PS4?
Yes, you will need to download and install PS4’s
day-one system software update 1.50, and then activate your Blu-ray Disc video capability with a one-time activation through the internet in order to play Blu-ray Disc films and DVD video content.
What if I’m not able to or don’t want to connect my PS4 system online?
PS4 owners in North America can contact SCEA Consumer Services at (800) 345-7669 to request a
Blu-ray activation disc that will be distributed via mail.
Can I watch DVD movies using PS4?
Yes, PS4 supports DVD movie playback; you will need to
download and install PS4’s day-one system software update 1.50, and then activate your Blu-ray Disc video capability with a one-time activation through the internet in order to play Blu-ray Disc films and DVD video content.
Can I listen to audio CDs using PS4?
No, PS4
does not support audio CDs.
