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Particularly with a USB device, but any other form of external storage device should be the same, a drag and drop operation to the device should result in a copy and not a move by default. An existing bug with data not being flushed to usb storage devices immediately can result in loss of data if a move operation is performed. Please see the following forum reference for more details. http://ubuntuforums.org/showthread.php?p=994249#post994249 ** Affects: Ubuntu Importance: Medium Assignee: Ubuntu Desktop Bugs Status: Confirmed -- Default drag operation to an external storage device. https://bugs.launchpad.net/bugs/43501 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs