How to get the excel list of all families inside the batch of Revit files,

Gents, I was trying to find something similar to this subject by searching but couldn’t find, I am working on a project that has more than 100 buildings and each building have about 6 disciplines, each discipline have its individual Revit file, can someone help me creating a dynamo script that can be used to list-out in excel, all the families inside the batch of Revit files with its categories and source file details? thanks