I have a female USB to male microUSB adapter which I used on my Samsung S3 a few times. I plugged a small SD card reader into it. I don't recall the details, other than it was painfully slow to view pictures and I gave it up. In my case I hunt at a friend's place and he has a house there. I brought up an old XP computer and we just use that to view game camera photos. It's not connected to the internet, so I don't worry about it getting infected with anything.
So, can't really offer help other than to say I did make it happen with my old S3 phone, but I concluded it wasn't worth the trouble.
You can never have too much ammo — unless you're swimming.