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June 29, 2016 12:00 pm

Study: 78% of Resold Drives Still Contain Readable Personal or Business Data

itwbennett writes: Blancco Technology Group, which specializes in data erasure, bought 200 secondhand PC storage drives (PDF) from eBay and Craigslist to see if they could recover any of the old data saved inside. Their findings: 78 percent of the drives contained residual data that could be recovered, 67 percent still held personal files, such as photos with location indicators, resumes and financial data, and 11 percent of the drives also contained company data, such as emails, spreadsheets and customer information. Only 10 percent had all the data securely wiped, Blancco said. The Consumerist points out that Blancco makes their money from promising secure data erasure, so the company has a "strong and vested interest in these results." As for why so many of the drives contain unwanted information, the report says it has to do with the difference between "deleting" data and "erasing" data. Your files aren't actually deleted when you drag them to the Trash or Recycle Bin, or by using the delete key -- shocking, I know. You can format a drive to erase the data, but you have to be careful of the format commands being used. A quick format, which was used on 40% of the drives in the sample, still leaves some residual data on the drive for someone to possibly access. A full format, which was used on 14% of the drives, will do a better job in removing unwanted files, but it too may still miss some crucial information. The solution Blancco recommends: buy a tool to perform complete data erasure.

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