So from what you said it sounds like the PS4 can read the update file you’ve put on the USB (assuming it’s the full update one for re-initializing the PS4 and not just updating it) but after it attempt to reboot itself to perform an update it just gets stuck on Safe Mode instead of installing the update.
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That is a big indicator of a bad hard drive. You can take out the hard drive and plug it into a desktop computer (before plugging it in make sure the computer is turned off) if you have one to check the health of the hard drive. You can alternatively plug the 2.5” PS4 hard drive into a portable 2.5” drive enclosure to check the health using the program explained below.
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That is a big indicator of a bad hard drive in most cases. You can take out the hard drive and plug it into a desktop computer (before plugging it in make sure the computer is turned off) if you have one to check the health of the hard drive. You can alternatively plug the 2.5” PS4 hard drive into a portable 2.5” drive enclosure to check the health using the program explained below.
You can use a program called Hard Disk Sentinel which you can download [https://www.hdsentinel.com/download.php|here] to check the health of the hard drive.
If it reports bad, weak sectors or data transfer errors or any other relevant health problems the hard drive needs to be replaced + PS4 - re-initialized with new hard drive to fix the problem.
So from what you said it sounds like the PS4 can read the update file you’ve put on the USB (assuming it’s the full update one for re-initializing the PS4 and not just updating it) but after it attempt to reboot itself to perform an update it just gets stuck on Safe Mode instead of installing the update.
That is a big indicator of a bad hard drive. You can take out the hard drive and plug it into a desktop computer (before plugging it in make sure the computer is turned off) if you have one to check the health of the hard drive. You can alternatively plug the 2.5” PS4 hard drive into a portable 2.5” drive enclosure to check the health using the program explained below.
You can use a program called Hard Disk Sentinel which you can download [https://www.hdsentinel.com/download.php|here] to check the health of the hard drive.
If it reports bad, weak sectors or data transfer errors or any other relevant health problems the hard drive needs to be replaced + PS4 - re-initialized with new hard drive to fix the problem.