The figure means that 66 used hard drives out of 100 sold would contain data data about the previous owner. Half of that number would still mean that every third used hard drive sold would contain personal data. The figures seem to grow worth instead of better with every passing year. Researchers seem to concentrate on hard drives but digital cameras or mobile phones might reveal the same amount of information including personal pictures, documents, contacts and even credit card or bank account information.

How can users protect themselves and their data? The easiest way would be to stop selling used hardware that contained data at one point. That solution is not always practicable though.

The user should make sure to make the data on the storage device unrecoverable. One of the best tools for that purpose is Eraser which can be used to clear the free disk space so that the files “underneath” cannot be recovered with file recovery software anymore.

Any tips that you might want to add? Let me know.

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