Not really worth replying, I have a feeling you don't get it anyway...
If you think that blackmailing is only done if there is something "worthy" to be uncovered then you are very wrong. And even implying that the subject would be offences of either illegal or sexual nature is just sad.
Facts are that the hard drive contained personal data, including financial records and emails. And the blackmail attempt was reported by a german newspaper who were offered the disk, but the offered 5000 Euro were not deemed enough by the man, who lives on benefits. He then went on to blackmail Sutil for 10000 Euro and was arrested at the supposed hand over of the money.
Btw, Sutil is friends with Hamilton, and it was confirmed that emails from Hamilton were on the disk. Ever thought that the stuff worthy of blackmail is not related to Sutil? I am sure you will now include Hamilton in your speculations as well. I won't, because as I said, it is a sad thing to make such unfounded implications about a victim of crime.