Attached is a macro along with the source code (VB.NET) I made that searches through a directory, finds any files that don’t have a where used and records it in a log file. It is especially useful for cleaning data before uploading to TeamCenter. A fair amount of the code comes from the Housekeeper project. Thanks to Robert Mcanny for making it open source. Also thanks to TusharSuradkar for providing resources on Solid Edge API, https://www.cadvertex.com/ebooks.htm.
You will find the .exe under bin\debug.