Need a simple Photo Viewer


I've got a Samsung Galaxy S4 and unlike my previous S3 it appears that the Gallery app behaves differently. On my S3 I could create Folders and Sub-folders. The Sub-folders would only appear if I drilled into one of the top level folders. This suited my hierarchical sensibilities. On my S4, when I open Gallery, all Sub-folders appear at the first screen. It's quite a clutter. Can anyone suggest how to either reconfigure Gallery to display only the current folder level or, alternately, suggest another Photo Viewer that does. I'm really not interested in editing features, just want to view photos in their proper folder hierarchy. Thanks!