How can I update my Nikon B700 firmware?

I have just bought a second hand Nikon b700 and it has never had a firmware update. I have tried several times and could not get the camera to see the firmware update file on the memory card.
Having looked on lots of places it seems to be a problem to lots of us. Am I missing something?

Steps I followed

  1. I have downloaded the update file to my laptop.
  2. I have formatted the card in the camera.
  3. I have transferred it to the card I am not sure if this part is done in the right way.
  4. I put the card back in to the camera, switched it on and gone into the firmware menu. The new firmware is not visible it only shows the original 1.1 firmware.

The battery is fully charged as this is said to important. Can anyone help please?