I will describe the procedure for updating the firmware BlackVue DR650GW-2CH:
1) Download the archive with the new firmware version from the official site:
2) We connect the memory card to the computer and format it in FAT32 format.
3) Copy the folder from the previously downloaded archive folder BlackVue to a memory card.
4) We will insert the memory card back into the switched off video recorder, turn it on and wait until the update process is completed. You can not switch off at the time of update! At the end, a notification is displayed.