Instructions
Look at the barcode label on the bottom of your console to determine if you have a backwards compatible PlayStation 3. Look for model numbers CECHA01, CECHB01, or CECHE01.
Turn on your console and use the directional pad to highlight the "Game" menu on the Xross Media Bar. Arrow up to access the "Memory Card Utility (PS/PS2)" menu and press "X" to open it.
Highlight and select the option to create a new memory card. Select a PS memory card and enter a name for the slot.
Press "circle" to exit this menu and return to the "Memory Card Utility" menu. Use your directional pad to highlight your newly created slot and press "triangle" to open an options menu.
Select "Assign Slots," then assign slot 1 to that memory card.
Insert your PS1 game into the disc loader on the front of your console. From the "Games" menu, select "PlayStation Format game," and hit "X" to launch the game.
When the game prompts you to save, highlight "slot 1" and press "X" to save to this slot. Your game information is now safely stored on your PlayStation 3 hard drive.