All PlayStation 3 models can play original PlayStation games. The PS3 doesn't use memory cards the way the previous two consoles did. This can cause trouble when you need to save an original PlayStation game, such as "Crash Bandicoot" by Naughty Dog. Before you can save these games, you must set up a virtual memory card. With this in place, the errors will go away.
Navigate to "Memory Card Utility" under "Game" and press "X."
Press "X" on "Internal Memory Card."
Choose "Internal Memory Card (PS)." This indicates that the memory card will be formatted for the original PlayStation. Press "X" on "OK."
Press "X" on "Slot 1." This will finish creating the memory card, and you can save in "Crash Bandicoot."