Yep, USB>HDD is a GLACIAL process. With a '10 E70 we haven't encountered the duplicate write problem with start/stop, as you describe. We DID encounter duplication [and other] problems when attempting to re-load from the USB stick after making edits to the USB stick. Because of this flaw in the iDrive HDD logic we abandoned HDD playback, and switched to center console USB stick playback - much more efficient for owners who routinely edit their onboard audio collection.
Last edited by Sea Doom; 08-19-2010 at 10:04 AM.