If you're using a 64GB PITTASOFT SD CARD, the format should be FAT32 not exFAT. To correctly format the 64GB card into FAT32, this can be achieved by the following methods:
**Using 3rd Party SD Cards (such as Sandisk/Lexar/Samsung/Kingston/Transcend/No Name) means you may experience issues with compatibility with your BlackVue camera, it is highly recommend to only use Pittasoft SD Cards when running 64GB or 128GB cards**
Note: If you require the latest PC Player software simply access the 'BlackVue' folder you downloaded and go into: