Share your experience!
Hi Freddy,
Welcome to the community.
I'm not sure what this box with the letter J is, but I'm just going to try to find some answers for you. In the meantime, maybe someone else in the community might have some ideas.
Thanks,
Pascale
https://discussions.apple.com/thread/6943027
"When your camera takes RAW and JPG at the same time the files are stored together. If the file shown is the JPG it will show the "J", if the file shown is the RAW file it will show an "R".
You can change which picture is displayed by:
1. going to edit tools by pressing enter.
2. Image > Use RAW as Original
You will see an "R" and this means that the file you are looking at is the RAW file."
Manolo