On my S6 i was able to move photos off my gallery and into albums. I thought i had been able to do this with my new (since Christmas) samsung galaxy S20.
So i have my gallery photos (e.g. my 'pictures') in front of me and decide i want to create an album and move 4 photos into a new album.... but now they aren't moving off the gallery and are just remaining there plus i also have them in an album (almost as if i had done a 'copy to album' )! This is so annoying.
I have read that some others have had this issue over the last year or so but never saw any solution to it. I did turn the phone off and on again but problem still remained!