"Memory Full!" message on my AZ401 camera

This means the built-in 8GB of AZ401 camera memory is full. This 8MB is only enough to take a couple of 'test' photos on your AZ401. 
Please purchase a standard SD or SDHC memory card, Class 4 or higher speed and no more than 32GB of memory in order to be fully compatible with your AZ401 digital camera. 
Always look for an SD or SDHC memory card, that is Class 4 or higher speed and no more than 32GB of memory. Larger capacity cards are NOT compatible with the KODAK PIXPRO AZ401 Astro Zoom camera and are not recommended.