2010-11-30 · 2010 What are those *.dat and *.idx files in the Microsoft Dynamics GP application folder? Off-Topic & Miscellaneous Archived post from 2010. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps. David Musgrave takes a break from Report Writer ramblings to clarify What are those *.dat and *.idx files in the Microsoft Dynamics GP application folder? Original article: https://blogs.msdn.microsoft.com/developingfordynamicsgp/2010/11/28/what-are-those-dat-and-idx-files-in-the-microsoft-dynamics-gp-application-folder/