[HELP] How to backup data from Recovery Is Not Seandroid enforcing GS6

Hello!

Some of my pictures were deleted so I tried to root and get them back. Now I face this huge problem and I am amateur so I need help. I tried to root my GS6 (SM-G920F) and now my phone is stuck on "Recovery Is Not Seandroid Enforcing". I used CF auto root and Odin.

I would like to know how to backup data? The pictures and videos are more worth than this phone.. I would like to know how to backup my pictures and videos and restore this to factory settings.

Thanks in advance!
Matias