What sim card slot for?

[gabe4utwo]

Opened up a gopro karma drone today to repair took top cover off noticed there is a sim card slot on the side anybody know what's its for

 

[dronelover]

That slot has been interesting for long but as for now, no body has anybody what its for.
Its could be a way for gopro to update and fix firmware as it looks like a small SD card slot.

 

[bozmanx]

It is an SD slot, I was told that it is for external logging but am yet to play with it. All versions of the drone have the board but they dont all have the SD connecter on it.