A bit late, but for those wondering, the WDBFJK0040HBK-NESN has a WD40EZRX (WD Green) drive inside. The previous generation (WDBACW0040HBK-NESN) has a Hitachi Deskstar 5K4000 drive inside.
This flagship iPhone 5s (newest generation) is the 16GB model in the highly desirable and harder to find sleek Gold design. Factory sealed in original plastic and locked to AT&T. The iPhone has an AT&T nano-SIM card pre-installed which has been deactivated. Thus, you will need to use your own...