Camera displays "memory full" even when i insert a memory card...pls help...

SOURCE: does not read memory card

Casio only tested 3 cards with the camera. Sandisc, Toshiba, Panasonic. First: Format the internal memory of camera and then reset camera. In rec mode press menu go to setup tab go up to format press right arrow highlight format press set. Follow same steps for resetting. Then insert mem card and format mem card. If that still doesn't work I would say there is something wrong with the camera itself and would need to be sent in.

SOURCE: Memory Full

What size is the memory card. What picture size has the camera been set to? Check out your Manual for the images sizes viz a vis memory card capacity - and come back

SOURCE: Memory card locked

I noticed that this camera does not work well with cheaper memory cards. The only brand that works without fail is the SanDisk brand.

SOURCE: my EX-Z60 reads MEMORY FULL i've only taken 3 pics

I would think that you are using the built-in camera memory, by default it will allow 3 pics.
You need to go to the menu, choose setup and on the 3rd page is Format. Format your memory card

SOURCE: SD card

It seems that you are using an SDHC (Secure Digital High Capacity) card. It's incompatible with certain older models of cameras. I think the most you can put in your camera is 2GB. I've done some research and it doesn't say anything about your camera being SDHC compatible. Return the card, get a 2GB.