![]() When you’ve picked how many wipes you’d like to run, click “OK,” then click “Erase” back at the initial prompt. Seven passes is going to take a long time, and even three passes will take at least an hour, so only use these options if you’re really, really paranoid. Zero Out Data: There are utilities that, albeit expensive and time consuming, can retrieve. The Pentagon is even more paranoid: they use seven passes. Dont Erase Data: This option only rewrites the headers on the disk. But three passes is what the US Department of Energy uses to securely delete their files. RELATED: You Only Need to Wipe a Disk Once to Securely Erase ItĪs we’ve discussed before, you probably only need one pass, at least with modern hard drives. The first notch to the right of “Fastest” writes over the entire drive with random data once the third notch, three times. Enter a name for the volume (I called mine OS X USB), select Mac OS Extended (Journaled) as the Format, and make sure the size is somewhere around 15-16GB. Go to the Partition tab and select 1 Partition from the Volume Scheme menu. That’s not what we want, so let’s move the slider. Open Disk Utility (Applications > Utilities) and click on your flash drive in the list on the left. The first option, “Fastest,” will delete the partition but leave all files untouched. You’ll see a sliding scale with four options: Click the “Security Options” button on the bottom. Make sure you click the drive you want to securely delete: you do not want to erase some other hard drive by mistake! When you’re ready, click the “Erase” button. ![]() ![]() Connect the drive you want to securely delete, then click it in the sidebar.
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