Hi JB, I own SMS and can answer here: the inventory logging is pretty light, unfortunately (the original design was just to quickly count, not look for details, for performance reasons). We have a work item to improve this, but in the meantime you can just start a transfer and let it log the actual failures, then download the errors log to find your miscreants. You can run as many transfers as you want and if most of data isn't going to transfer, it will be over with pretty fast :(. In fact it might be better just to use ICACLS to grant admin and system rights back all over the source machine first, just to eliminate the issue.