: If you have replaced your hard drive, you need the "Recovery" version, which is approximately 1 GB .
Updating your PlayStation 4 to is a specific requirement for many users, particularly those interested in the homebrew and jailbreak scene. Because Sony's automatic updates will always push the newest available version (which is currently well beyond 9.00), you must perform a manual update via USB. Essential Preparation
Comprehensive Guide to PS4 Firmware 9.00: Download and Installation ps4 900 firmware download install
Before you begin, you must take these steps to ensure your console does not accidentally update to a newer, non-exploitable version.
: Navigate to Settings > System > Automatic Downloads and uncheck everything. : If you have replaced your hard drive,
Since the official PlayStation site only hosts the latest firmware, you must source the 9.00 file from reputable community archives.
: The file must be named exactly PS4UPDATE.PUP (all caps). : The file must be named exactly PS4UPDATE
The PS4 is very specific about the folder structure and file system of your USB drive. How to Jailbreak the PS4 on 9.00 with a USB (Full Tutorial)