Hello have your already changed the path through the storage options and moved the files?
I would suggest starting over here if the files are indeed still in the old gallery/data directory. In Admin => Global Options set your path to the kenyans/gallery/data one. IN Admin => Storage Options hit revert path to get things back to normal
Next make sure the new directory you are moving files to exists and is 777. You can then use the change path screen and enter the new path. Your url woud stay the same and hit save. You should be presented with a box that tells you the files will be moved. If everything moves fine you should be serving the new images from the new directory.