Perhaps you got home and found you took some shots that turned out too dark or too light. They had the potential to be great shots, but it's too late to change exposure settings now.
Well, perhaps you can still use them after a bit of post-processing.
This information is also relevant for your next flight because it is to do with exposure settings.
Your camera sensor records the brightness of a pixel as a number. Let us say the digital range is from 0 (no light) up to 255 (maximum light). In simple terms, the amount of light a brand of sensor can cope with is divided into 256 steps. A poor quality sensor will still have the same divisions, but its capacity for dark might be a dim room and an overcast sky might be its maximum light.
The point is, anything darker than its 0 will still be 0. Anything brighter than 255 will still be 255. For the poor sensor, a grey cloud might be 255 and so will the full sun.
So what can we do to when we are taking a photo with large variations of light in the scene?
The easiest way is this.
Only if your sensor can cope with the extremes of light in this scene, you can expose for the brightest area. Such a scene might be blue sea, dark cliffs and white clouds in a clear blue sky. If the sun is in the shot, expose for the clouds, because no sensor can cope with it and like the clouds, it will be 255. Clouds are more interesting than the sun.
You will probably find the image is underexposed and the shadows in the cliffs are black.
Alternatively, use HDR (High Dynamic Range) setting. This takes several consecutive shots of the scene with different exposures, combines them in-camera and shows a single JPG result. You won't get RAW this way and further post-processing will be quite limited because of the data loss in JPG. Also, anything moving in the scene can show up as ghosting of the moving area.
The Pro approach might be to use Bracketing. Again, the camera takes a series of consecutive shots within a maximum and minimum exposure range that you can set. You then have to manually combine the different images using photo editing software. Movement in the scene is still a problem. Usually, you can use the RAW copies to work with.
Here are some non-drone shots to illustrate the detail you can retrieve from dark or light shots when post-processing RAW or DNG images.

If you want more like this, just ask.

Thanks for the insight!

Thanks for the info!

Nice, Thanks for the info

Thanks for sharing

Thanks for sharing.