Connect a USB Storage Device That Contains an Update [Fixed] | PS4 Storage Expert
The update file can not be used connect a usb storage device that contains an update file for reinstallation for version 6.00 or later. (CE-34788-0). I have done everything it says and
Fix: PS4 Update File Cannot Be Used Error Code (CE-34788-0)
How to update your PS4 to firmware 4.05 (or any other firmware) - Wololo.net