A useful addition to the SharePoint Migration Tool would be to support the option for excluding paths in a file share to SharePoint migration scenario. It would be very useful to put an exclude symbol "-" in front of a mapping while building the .csv. In this way you are able to migrate the only what you really need. Example: a library with 50 folders and you need 48 of them. In the current version you migratie everything and in a post migration step you need to manually find and delete these 2 folders. Or I need to add 48 mappings within the .csv.