It is important to distinguish between the SData Tool and the "Fake Flash" drives often sold on auction sites. Scammers often sell cheap drives that have been hacked (using software similar to SData) to appear as 1TB or 2TB drives on a computer.
When you try to save more data than the drive's actual physical capacity, the new data overwrites existing files, or the files become corrupted and unrecoverable. Deep Technical Analysis 1. How the Scam Works Sdata Tool 64gb