I asked because that was what I was concerned about on our trip. I found a unit that is called a Digital Partner. It has all of the slots for most styles of memory cards. It has it's own 40 g hard drive and own batteries. No computer or other devices needed . I would just download all of my pictures each day and clear my memory card and start over. When I got home I just uploaded my pictures into my pc at home. It worked great. They can be a little pricey mine was about $60 used on ebay, but worked flawlesly. Just an Idea. It would be easy if you could put them on some flash drives with the computers on the ship. Maybe someone has done that, and will let you know.