There's bound to be way to get your data off there, if the drive isn't fried, and there's a good chance it's not. I've worked in electronics for years before getting into programming and in my experience overvoltage generally cooks the first component it gets to and stops there. So finding someone with a Mac (and willing to help) would be your best shot at recovery. Even if you get a new drive, don't pitch that one. You never can tell when something wonderful may happen.

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