By C. Tiong (Utah) - reviews
This review is from: PS2 32 Meg Max Memory Card (Accessory)
This is the new 8 97459 00003 9 model. After you have 10MB of saved files on the memory card, games can no longer save to it. Some games will saved a corrupt file, or unable to save, or giving error there's no memory card.
PS2 also can't copy any saved games from another memory card to this 32MB memory card once it has 10MB of saved files.
If I delete some saved files to free up the memory card to less than 10MB of usage, any games will be able to save to it.
My theory is PS2 has problem writing to the memory card once it has 10MB of saved files.