How To Fix Cannot Start The Ps 4 Cannot Access System Storage. Once in safe mode, right-click Start, click Run, type cmd in the Open box, and then click OK. Click the "Start" button to begin scanning.
When you press the PS button as prompted, you'll enter the Safe Mode and get another screen message: Connect a USB. Make sure you reconnect it securely. Then, reinsert the HDD in the mounting bracket, replace the screws, and reinstall the HDD mounting bracket.
Wait patiently for it to complete.
Make sure you reconnect it securely.
If your system drive is different than C:\, type C: and then press Enter. Open the hard drive bay cover and make sure the hard drive is properly seated. Connect your controller via USB and press the PS button.