I want to copy my Time Machine Backups drive. I want to have two copies when I finish, not just one copy on a different hard disk. Following the instructions here, which are echoed other places, I have dragged-and-dropped the directory Backups.backupdb from "Disk 1" to "Disk 2". The dialog box with a progress bar is titled "Copy", but I am afraid it might erase the version on "Disk 1", because drag-and-drop usually signifies move and not copy. Will it copy? Or will it move? I hope it will copy, or else I will have wasted a lot of time. Thanks.