Micro SD card issues

utlekle

Hi Guys! I have a problem with my Nikon D5100. I am using a 64GB micro SD card with adapter as storage. In Raw format the device is not able to store the pictures over the number of 400. Over that number the pictures are just unavailable. Is that a common problem or is the problem with the type of card? I could use some help because I lost a lot of great pictures. I ;ook forward to your answers.