Wanting to update my SD card to the recent firmware. Checked my SD card and there is nothing on it before updating. What do I need to do?

Which Phantom are you updating?

Phantom 3Professional 4k

We can write out a text ... but best is to just watch Youtube ... plenty of vids about updating the P3P ... pick from this page for example :

https://www.youtube.com/results?search_query=How+to+update+DJi+Phantom+3+Professional

Basically you do not update your SD Card ... what the SD card does is have a copy of the FW bin file.

It's okay if the SD card is empty. Follow these instructions to update the firmware from DJI GO:

Hi, thanks for the inquiry. The Phantom 3 4k can be updated using the DJI GO application, if there will be an available update, our customers would be notified and be able to update the firmware of their drone. Please refer to the link below to check the latest firmware version of Phantom 3 4k. Kindly keep us posted on the latest progress.

https://www.dji.com/phantom3-4k/info#downloads