There are a few reasons why your PlayStation 4 might keep ejecting the disk. One reason is that the system may be trying to identify and format a new disk when it doesn’t have any disks left in its internal storage. If you have more than one disk in your PlayStation 4, you may need to format them all into one large disk so that the system can find them easier. Another reason is that the PlayStation 4 may be trying to warn you about an impending power outage. If you don’t have any disks left in your PlayStation 4, your system might need to power off completely so that it can properly clean and initialize its components.