Is this not an Android device free space error?
Which controller / device combo are you using @Wadda-C2? Are you using the RC 2? Or the RC-N2 with a phone or tablet?
At a guess, your device is probably full of default cached video from the Fly app. Have a nosey in and around the \android\data\dji.go.v5\files\mediacaches\ folder paths.
More info here: DJI RC Pro controller - Location of cached video files - #6 by ChrisM