PlayStation Knowledge Center: PS2
PlayStation 2 70000 Series
PlayStation 2 50000 Series
All PlayStation 2 System Series
Internal hard disk drive (40GB) (for PlayStation®2) (HDD) installation will change the way you store and manage saved game data on the PlayStation®2 computer entertainment system. The biggest change is the addition of folders that can be used to store saved game data on the HDD. The HDD also changes the options you have for handling data on a memory card (8MB) (for PlayStation®2).
NOTES:
NOTE: You might be asked "Do you want to overwrite existing data?" This happens when the destination you select already contains saved game data from the same software title. Highlight Yes and press to replace the existing data with the new data.