Put a file named
.nomedia in the folder. This can be a zero-byte file if you want — the name is what matters.
Go to My Files folder, then Pictures or create a folder and name it whatever you want. Go the newly created folder, add another folder again and name it .nomedia. Copy or move photos in the folder (not the .nomedia coz it won’t show after creating it). Then you check in the gallery, and voila! Folder isn’t shown!
PS: The pictures you have copied/moved can be viewed only in My Files folder, which is much safer.. 😉
PPS: This works on my samsung galaxy win.
Hope I had helped a little
You will start the name of the folder with a period (.). Example: