I encountered a similar problem. I changed phones this week and just popped in my old sd card. What I didn't realize was that all files by default were going to internal memory for anything freshly installed on the new phone and all files previously saved on the sd card from the old phone were actually in "sd card ext" rather than the labeled sd card. Mine's not a samsung but one suggestion if you still can't find the file is backing everything on the card up then formatting and copying back over. Another thing when it comes to save states from different versions of FPSE only memory card saves seem to work to begin with.