Nice. Must a good omen.

Yes, you need an adapter for the CF slot. I picked up a couple from Amazon. It is a Type 1 CF (Type 2 will not fit) to SD. I bought a couple of brands and one was slightly thicker than the other (could be the label was thicker). Both worked, but I am using the thinner one as it comes out easily.
I am packed for a trip or I would give you the brand. I may be able to give it to you tomorrow.

BTW, on Amazon, when I searched for CF to SD I was smothered in CF WiFi adapters. I had to page through them to find the CF to SD adapter.

I have a 5D Mark IV and use SD cards because my other two cameras use SD cards. It is just more convenient for me to only carry SD. I found a CF to SD adapter that works really well, so I have SD in both slots.

Paraphrasing the columnist George Will: If you are in a hurry, what are you doing at a baseball game?

I spend time at Brookgreen every year and love all of it. If you are into birds, they have an aviary that is part of the zoo. The birds seem to know to pose for you. Also, there is a state park across the highway from Brookgreen with a boardwalk into the wetland. Enjoy.

Is the first character missing or has it changed to an underscore? If your color space is sRGB the default is IMG and if Adobe RGB the first character is changed to an underscore. Just a thought as I am not familiar with the 80D.