Lost cable drone has been idle for 6 yrs

[cash]

I need help what cable is used for upgrade on phantom 4??

 

[Starz]

Should look something like this. Any particular reason for an update?
It’s not mandatory.

 

[shakenjake]

Personally, if the drone is operating fine, I would not do any additional firmware updates.

 

[crash1sttime]

Never update a working quad from that particular era, they are prone to problems which will mean more time spent here that could be spent flying