This is an external hard drive. You can't just build it into the PS4. The easiest way is to buy a laptop hard drive (for example this one: Samsung Spinpoint M9T (2000GB, 2.5", Notebook)). If you need more than 2 TB, then there is the possibility to "install" a desktop HDD. However, this does not fit into the PS4. Either you can run it next to the PS4 and connect it via cable (see tutorial here: http://www.gamefaqs.com/boards...) or you buy a "Data Bank" from Nyko (http://www.amazon.com/Nyko-Data-...). Note: Disks with more than 2 TB are not officially supported. You can get the PS4 to work (I have a 4 TB with Nyko Data Bank: https://www.digitec.ch/de/s1/product/seagate-desktop-sshd-4000gb-35-desktop-festplatte-2374855), but Rest Mode will no longer work. This also means no more suspend/resume and always having to shut down the PS4 completely.