I have searched the forum and not found what I am looking for. It could be my lack of search skill, so I hope this is not and over asked question. We have a 2014 Itasca Navion IQ with a dashboard Rand McNally GPS. I went to update my maps and found I need a bigger SD card. RM wants $225 for a new card which seems like a ridiculous price. I have a blank 16gb card and need to know how to get my gps to read it. I copied all the data from the original 4gb card and then did the update with the RM docking software, all seemed to work, but the GPS unit is being finicky and won't read the update. Any suggestions, Thanks