HI, I'm new to this so apologies if this question has an obvious answer. I can start recording video but after about 70 seconds I get an "Sd Card error, rectifying" message and the recording stops. I can restart recording but the second video file is unreadable. The file take prior to the error is ok and plays on VLC no problem. I'm using a 64Gb Samsung class 10 micro SD card. Any suggestions?