My photos disappeared from my Samsung S5 sd card. Trying to recover photos or find hidden files
You can goto My Files, settings, check Show Hidden Files. Now you can see hidden folders beginning with "." (say .hidden) in your device explorer. Check you sd card for such folders beginning with . that may contain your files. If not then you can connect you sd card via card reader to your pc and run the windows app "recuva" (search recuva by piriform) to search for deleted files. 
Hope this helps :)