As an administrator, you may find testdir.tmp files on NTFS shares. When a file is copied to an NTFS partition, NT creates the testdir.tmp file as part of the copy. It is normally deleted when the copy succeeds. It will not be removed if the user does not have delete permissions in NTFS on the share. Not common but we there are occasionally needs to allow users to copy but not delete. Or to copy and not read. An example is backup of ERDs to a network share.

Watch the Amazon reviews. I suspect it will get bipolar ratings with lovers & haters. It has action items, checklists, ... After all its titled handbook not secrets.