App to swipe/overwrite data, broken screen

I also posted this in the Galaxy forum, so sorry for the double thread. But I am hoping I can find a quick plan of attack here. I need to ship the phone back in next day or 2.
App to swipe/overwrite data, broken screen

Short story is, screen not functioning. I will be sending it back to Seller. Is there an app that will actually overwrite all data on drive which can work from a PC without...

App to swipe/overwrite data, broken screen

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