They could have easily quoted something for a proper x-pass data wipe, or cost a of a new drive and destruction service, plus a cyber security consulting fee. I would be surprised if it wouldn’t hold up at least a little bit in court (I know very little in the way of dutch courts) but if your response is “this is the proper way to destroy data, if you actually want it securely wiped I’ll need you to foot this bill, otherwise it’s hitting my recycle bin”. But there’s probably some details missing of this guy being a complete dick to get an officer to want to do paperwork over it.