Write all this up as part of the learning curve mate, go through the FLY app menu and use the camera settings tab to format the microSD card while it's IN the drone. I always format the card like this three or four times on the trot, personal habit. A single quick format leaves random data in the free space and I like to make certain everything is cleared out.Thank you for the info. I believe i have my drone set to save on the micro sd card, but i will double check this.
Start fresh with your next flight and remember the advice in this thread about transferring photo's and video directly from the microSD card with it slotted into your computer's card reader. Transfer them from the SD cards DCIM folder into a new folder every time and name each folder with the date and shoot location.