Look, I'm a programmer... I'm basically taking exception to the lack of technology savvy he displayed by calling it acid washing as well as claiming it was expensive.
There are plenty of ways to scrub hard drives, acid... Well, honestly the right kind of acid would probably work but usually you run software to repeatedly overwrite the bits with garbage and then shred the drive for good measure.
Did Clinton mishandle email? Seems pretty likely. Did she do it in a way worse than Republicans? No. Is that worse than the Things Trump has done? Again, no.
"I'm basically taking exception to the lack of technology savvy he displayed"
Yes to those in the know it makes him appear like a luddite.
Unfortunately there are many that will be just as clueless as he is about it. I bet he even had it explained to him and is deliberately continuing this line of describing it.