sd card problems

hi all. Has anyone had issues with "SD Card Error" when filming Video in any intelligent mode or sometimes when switching from photo to video? SD goes to N/A and you can't use the Camera anymore until you reboot. Drone shop said it should go back, but I just got my P4 back after 2 mos of DJI...

Dear friends, Just got my Mavic for Christmas and due to weather conditions haven't been able to fly it but for two very small periods of time. While waiting for the Mavic to arrive I purchased in Amazon an adequate 64 GB micro SD card and replaced the 16 GB card that came with the bird; my...