You need to be on WiFi. Open a desktop browser and point it to the URL that the app gives you in the Upload tab or get the Tiny Loader Mac app (http://www.catnapgames.com/tiny-loader/) to just drag & drop files and folders - it finds your phone automatically using Bonjour.
If you still have problems please msg me directly or tweet @catnapgames, thanks.
If you still have problems please msg me directly or tweet @catnapgames, thanks.