Fat PS2, Memory slot 1 won't read Memory Slot 2 will

The 8 MB Memory Card allieviates that problem by organizing and storing files much more like a computer hard disk

As DRG stated, make sure you are using a PS1 Memory Card You need a PS1 Memory card to save PS1 games and PS2 memory cards to save PS2 games

ps2 memory card slot 1 not working Fix Your PS2 Memory Card This is a fix for PS2 memory cards that cannot read properly

slot demo automaten Create an Internal PS1 or PS2 Memory Card This method It's best to assign a card to Slot 1 The two virtual slots