Researchers from BT and the University of Glamorgan have found a disturbing number of hard drives sold on auction websites and at computer fairs contain sensitive information. The study, conducted in the UK, United States, Germany, France and Australia, uncovered that 34% of the randomly purchased 300 drives contained personal data, including bank account and medical information. Details of test launch procedures for a ground-to-air missile defence system was also found on a disk purchased on eBay. Weve discussed before the problem of people selling on used hardware like disk drives without properly wiping it.”]
Source: https://grahamcluley.com/34-sold-hard-drives-personal-data-study-reveals/