Reinstalling System Software | PS4

Here are the steps to take if your PS4 system starts up in Safe Mode with a message requesting an update file on a USB device. These directions are only recommended for PS4 systems that cannot start up normally, because following them will delete all data from the hard disk. .

Concluzion: Reinstalling System Software | PS4 – Safe Mode Loop,Factory Reset,Initialize PS4,Hard Reset,Replace PS4 Hard Disk,Replace PS4 Hard Drive,Upgrade PS4 Hard Drive,PS4 HDD

source