the file system mp is one idea, however you really need to read the warnings and fully understand the mp before using it, and you will want to test what you are going to do in a lab, to make sure it will not impact your ospmgr infrastructure. configuring this mp wrong can do really bad things to your opsmgr infrastructure. (just have to warn you)
WARNING:Discovery of folder and files must be used only to discover the needed objects do monitor. However, it is possible to discover thousands of files and folders. This exceeds the Microsoft best practice of defining an object class of no more than 50 – 100 objects.