A FAT32 with MBR partition table is requried to update the firmware



It was found that if the micro SD card memory device has ever been formatted a NTFS then the GPT marker / partition needs to be completely erased.

To do this we have found using the Windows "diskpart" tool, this can be access from the DOS / command prompt by typing   diskpart   and then return

1. insert USB memory device
2. in command prompt type  diskpart
3. type  list disk
4. select the USB disk, it's likely to be the last in the list, by typing   select disk 4   - 4 is the example number
5. type  clean
6. type  convert mbr
7. type  create partition primary
8. type  format fs=fat32    - this will take quite a while as a full format is being performed
9. type  exit     - this is to exit the diskpart tool

Then copy the required file onto the micro SD card memory device