I just purchase a 128GB Samsung Endurance Pro for my Blackvue DashCam. Its common to do a format before using these cards. When using the PC it comes up with a message. The Directory Name Invalid. When plugged into my dashcam it does not recognise the card. I plugged it into my phone and tried to format it this way which it appeared to do but its made no difference in terms of its use. I'm lost, but for a new product I cannot believe its not working.