On the subject of formatting.
As a professional photographer using SLR cameras, if you simply delete and do not format, you do not actually 'delete' in totallity, which is why the files can be recovered AFTER DELETING by a recovery program. If you then shoot on a 'deleted' card, the old files are still there in the background and what you are actually doing is OVERWRITING the new files. This can, sometimes (and Sod's Law dictates it will only happen when the pictures are important!) result in the files becoming corrupted. It has happened many times to photographers everywhere and the tales of woe crop up on forums, such as this.
GOOD PRACTICE dictates you format after every download. No need ot delete then format, simply format and it wipes the slate clean with far less chance of corruption. I actually do delete and then format. In the camera, I haven't taken a picture with the drone yet! But the background system must be the same, as to how the cards are written to.