Thread:Project:Support desk/Organising files with a file manager/reply

MediaWiki is not the best software for organizing images (Ask any admin, I'm sure they could give you a big list of things wrong with it).

Where the images are stored is supposed to be an implementation detail (As in, something that shouldn't concern the user). Instead users should categorize images by putting. You can then go to the page Category:Image_type which will show thumbnails of all images with  on it. (Example commons:Category:Featured_pictures_on_Wikimedia_Commons ).

If you want to display the category hierarcy as a tree, see Extension:CategoryTree (example

You can also use extension:DynamicPageList (Wikimedia) to get a bunch of thumbnails of images depending on what category they are in and other criteria.

See help:Categories for details.