If you’re doing development on Windows Phone you will really want to get these two tools:

 

First, Windows Phone Tools (standalone app) from Codeplex: http://wptools.codeplex.com/

Second, Isolated Storage Explorer extension for Visual Studio 2012 (requires Pro or above) http://visualstudiogallery.msdn.microsoft.com/c4cdb312-2017-4370-a572-8c38526f4b4a  integrates basic Isolated Storage access directly inside VS.

Both highly recommended!