what memory card works for this product? do you suggest 16gb or 32

I got the camera with an 8GB card and am currently running a 32GB in it. It definitely supports the higher capacity cards up to 32GB, I can't speak to 64GB which a different memory spec. I would suggest the you opt for a Class 10 memory card even at the cost of less memory. 16GB is a lot of storage space to work with.