The card/s is a Sandisk Extreme 64GB U3 A2. I have 2 of these cards. Every time I turn the drone off I have to pop out the card and reinsert it a couple of times before the card pops up under the camera/SD card menu. It did not do this when the drone was new. I had no problems. Then it started having problems so I bought a second card. Both cards have been formatted in the MA2. Still when I turn the drone on I have to remove the card from the MA2 and reinsert it a couple times until the drone recognizes it. I have tried formatting the original card to ExFat on mac, and formatted on a Pana GH4 camera and still got the same result. The cards work on the mac and the cameras. Does anyone have a fix for this. I read these cards work well with DJI products. I am going to try a diff brand card next. Any suggestions. Firmware is up to date. Thank you in advance.