If you are looking to format your PlayStation 4 hard drive, then you will need to follow these steps:

  1. Open the PlayStation 4 system software.
  2. Click on the Hard Drive icon in the top left corner of the screen.
  3. Select the Format Hard Drive option.
  4. In the resulting window, select the desired format and click on OK.
  5. The hard drive will be formatted and you will be able to access it as usual.