The Format HDD feature will erase all data on your internal hard disk drive (40GB) (for PlayStation®2) (HDD) and then install the HDD Software. All games and saved game data stored on your HDD will be gone after reformatting. Before you format the HDD, we recommend you transfer any saved game data onto one or more memory cards so you can restore the data to the HDD after formatting has been completed.
NOTE: Do not turn off your PlayStation®2, open the disc tray, or remove the HDD from your PlayStation®2 until the procedure is completed.