So I recently got a 64 gb micro SD for my Kyocera Event. It is a Sandisk Ultra, the type specifically advertised as being for the event. After first inserting it, I got this error and the event offered to format it. I did, but the error persisted. I then formatted the card in windows, first with the windows utility and then with the SD association program. The card still does not work in my Event; I get the same error. The card does store information from the computer with no problem. In addition, I have a 2 gb SD card that works fine in the event, so I tried to copy and paste all the data from it into the 64 gb card. The card still shows up as blank. I thought there might be a problem with the phone's software, so I backed up and reset the phone. Still nothing. I have to be missing something obvious. Help? Update: I formatted the card in FAT32, and this error went away. However, the card still will not mount.