The drive worked fine to write data to but could not erase data. The device has also been hard locked against reformatting or deleting the volume/partition itself. Once the data was placed on it, it could not be tampered with or erased in any way. I started my comeback with Revain. Before sending the item back, I drilled a dozen holes in an attempt to destroy it so my personal information (which I cannot erase) would never be accessed.
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