What is wrong with my memory card.?

Question

I have a PS2 and every time I go to save something it says that an error occured. It says that the memory card has been removed or replaced. Well I haven't done that and the memory card is where it should be.

Answer 1

The memory card could be full

Answer 2

Try cleaning the contacts with some Isotropic alcohol (Rubbing alcohol,Contact Cleaner) - maybe the contacts have a little corrosion on em :D