When a user copies a file containing sensitive data from a Mac endpoint to a removable storage device, the agent blocks the file copy, a block user action pop-up displays, and an error message displays. This occurs when the Endpoint Prevent: Block response rule is used.
This operation can't be completed because one or more required items can't be found. (Error code -43)
The application used to copy the file displays an error message to indicate that the copy operation was unsuccessful.