Your FZ152 is equipped with 8MB of internal memory, which is only enough to take a few photos intended to test the camera.
You must purchase (separately) or use a standard SD or SDHC memory card that does not exceed 32GB of storage and is a Class 4 or higher speed for optimum performance.
Do NOT use an Ultra, High-Speed, SDXC or other card as these are not recommended for use with the FZ152 and will risk your camera not working at optimum performance.