Formatting does not remove a volume's data
Whatever formatting options you choose, you will be warned that the action of formatting a volume makes that volume's data inaccessible. That's true. Whatever data is there when you format will no longer be available to you by normal means after you format. Unless you use the /P switch, the data remains in some form, however. If you're really concerned about covering tracks, either use the format /Px (where x represents the number of passes) or wipe the disk after you format it, by using the command-line program Cipher.exe, with the /W switch. (Type cipher /? at the command prompt for details )
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