PS4 HOW TO UPDATE SYSTEM SOFTWARE (All Versions)
Initialisation of your PS4 system removes all of the info contained in your PS4 system storage; this process is usually mentioned as a "factory" or "hard" reset. Initialisation also deletes all users and their data from the system. PS4 Safe Mode option 7 (Reinstall System Software) also will replace all firmware on the system. Selecting either of those options should be considered because the last step when troubleshooting.