In order to work with and update a file that I keep in the vault, I move the file to a temp directory on the drive the vault is on. When finished I move the updated file back to the vault. Is there any capacity in secure access to wipe the drive after I have moved the file back? If I lost the drive I would not anyone that happens to find the drive be able to reconstruct the file from detleted space. Do I need to wipe the drive with a seperate program?