How to prevent Android from creating "Android" and "Lost.dir" folders on external OTG storage?

If I either connect my camera using a USB cable via OTG or insert the SD card in an OTG reader connected to the phone, Android creates automatically two folders: an Android folder and a Lost.Dir folder. The problems are - 1. That as long as these two folders are on the camera (a Pentax K50), this latter thinks that the SD is not properly formatted and asks me if I want to format it or otherwise I cannot use it again. And indeed if I delete the two folders using my PC, I can then start using the card again. Obviously, I cannot format it. 2. That I cannot delete these folders on the phone without reliably preventing Android from recreating them. Also, the two folders remain on the SD even if I properly eject the OTG storage. 3. That I am going on a trip and I won't be having a PC with me to use to remove the folders. Given all of the above, how can I then transfer the photos from my camera to the smartphone?