Hey Bill,
Nintendo's support site states that it cannot guarantee that products other than the included SD card will work. Incase you haven't checked it yet, here is the compatibility Support Article: [http://en-americas-support.nintendo.com/app/answers/detail/a_id/274/~/what-sd-cards-and-microsd-cards-are-compatible%3F|SD Cards] as well as a list of compatible cards that have been tested: [http://en-americas-support.nintendo.com/app/answers/detail/a_id/13995/session/L2F2LzEvdGltZS8xNDQxMjQxNDQ2L3NpZC8ydUFxcXZ2bQ%3D%3D|Tested Cards]. I hope this helps!
Best of Luck!