Follow the steps below to create a File List variable:
From within the Project Designer page, expand the File System folder in the Component Library, and then drag the Create File List task to the Project Outline.
On the Basic tab of the Create File List task, specify the File List Variable value:
File List Variable
The name of a variable that will contain the list of files being created. This will be a variable type of File List. If this variable exists, then it will be overwritten.