Create a folder with a . (dot) before its name, and add an empty .nomedia file inside it. (.(dot)nomedia - exactly as I typed it) and add your files ands images there.
Now other Apps like Gallery will ignore these images. That's the only way that I think this can be done.
E.g.: folder name: .images
which includes an empty file .nomedia

Create a folder with a . (dot) before its name, and add an empty .nomedia file inside it. (.(dot)nomedia - exactly as I typed it) and add your files ands images there. Now other Apps like Gallery will ignore these images. That's the only way that I think this can be done. E.g.: folder name: .images which includes an empty file .nomedia