I saved a game last night and then turned off my ps2. This morning the memory card is saying that its too full. Then when I try to delete some stuff it says there is no data. I can't save anything or delete anything. How do I restore any data lost or how can I fix this?
It sounds like your PS2 Memory Card may have bit the dust. There are accessories that will let you access your PS2 memory card from your PC, which may allow you to recover it, but given your explanation of the problem, data retrieval seems unlikely. Sorry to be the bearer of bad news.