The term “unstructured files" refers to data stored in a filesystem that is NOT usually accessed by a DBMS or similar software. Unstructured files can consist of anything from a simple directory to the root of a complex application like Oracle Enterprise Business Suite.  Like with other data types, you can configure a dSource to sync periodically with a set of unstructured files external to the Delphix Engine. The dSource is a copy of these physical files stored on the Delphix Engine. On Unix platforms, dSources are created and periodically synced by an implementation of the rsync utility. On Windows, files are synced using the robocopy utility, which is distributed with Windows.  dSources enable you to provision “vFiles,” which are virtual copies of data that are fully functional read-write copies of the source of the original file. You can mount vFiles across one target environment or many.