The first step is to determine whether or not the Blu-Ray drive is broken. To do so, you have to eject the disc. This can be done in two ways with the first one having to be manually using the eject button, which is located below the power button on the PS4 when it is lying down flat horizontally. The other option is to press the “Options” button on the Dual Shock 4 with the videogame highlighted on the Home menu. Doing so gives you the option to “Remove Disc.”
With the disc out of the Blu-Ray drive, you should check whether or not it is dirty or have been damaged. To clean a dirty disc, use a lint-free cloth and wipe from a straight line from the inner circle to the outer edge. You can find out more details on this process from Sony’s website.
Insert the cleaned disc back into the PS4 again to see if you are still getting the same CE-30005-8 error code as before. You can also try out other PS4 game discs or Blu-Ray movies to see if the problem is limited to just the videogame or if there really is a problem with the Blu-Ray drive.
If the above troubleshoot step could not solve your problem, then you can try to delete and restore the game data on the hard disk drive. To do so, you must first back up the save data using either a USB storage device or online cloud service if you are a Playstation Plus member. Both options are located in the “Settings” menu, which is located to by pressing up from the home menu and then scrolling right. You should then select “Application Saved Data Management,” and, subsequently, “Saved Data in System Storage.”
Once that is done, go select the problematic game and then press the Options button in order to bring up the “Delete” option. Re-install the game data from the disc, which should automatically happen. Afterwards, restore your save data via the Playstation Plus online storage or USB device from the same “Application Saved Data Management” option of the “Settings” menu.
If all else fails, then the last resort is to use the Contact page from Sony in order to resolve the CE-30005-8 error code. Most likely, you may have to send your PS4 in for repair due if it is a Blu-Ray issue. For the hard disk drive, you can try to replace it manually.