Buy another card.
We went with the intention of doing that, too but decided against it! The lady behind the counter didn't know how the machine worked. Then she asked another CM and that one wasn't too sure how to do it right, either! They told us there have been problems with the system losing pictures- especially with SD cards. We didn't want to chance it, so we just cut down on the number of pictures we took. Still took over 400, so not too bad.
At MGM, the guy there seemed a little better, but not much and I was still nervous. Thought about buying another memory card there but it was WAY overpriced!! We plan on buying a few more memory cards before we go again. Maybe it will get better in time, but I think the service is just too new.
This was our experience, maybe someone else had a positive one?