I'm going to destroy the stolen files to keep them secret.
Why would you destroy them to keep them secret?
They are my files I wanted to destroy, I don't want people to see that.
It is wrong to destroy things if it might be evidence of a crime. You should use passwords to keep privacy from spys.
I'll keep my eyes on the files to be sure.
You might need them one day though. Also deleting them doesn't actually get rid of them you can bring them back up from a disk later.