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There are many free and paid options to securely erase data from external storage devices. Choosing an app to securely erase external storage devices A major benefit of this is that you typically get more control over exactly what is erased and how. This is a bit extreme unless you intend on getting rid it anyway.īut since formatting the device isn’t a fail-safe option, you might get more peace of mind from using third-party software. If you really want to be sure your data is wiped, some developers - including those sharing views on Stack Exchange - suggest the only way to totally erase the data on an external storage device is to take a hammer (or other destructive tools) to it. Securely erasing external storage devices using an app Click the Eject icon to the right of the device in the Finder or Disk Utility windows before you remove the device.The further to the right you move the slider, the higher the level of security will be. If you had sensitive data previously on the device, click on the Security tab and then choose a security level.Select the default GUID Partition Map (GPT) scheme.You should also use this format if you may share the drive with Windows PCs. For external drives, it is recommended you format in ExFAT. In the drop-down window, under Name, type a name for the drive.In the sidebar, click on the USB drive you want to format and then choose Erase from the top toolbar.Go to Applications, select Utilities, and double-click on Disk Utility.

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How to format an external device using MacOS You can eject the device after you see the “Format Successful” pop-up message.

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A full format will take longer but will perform a scan and do a much better job of ensuring files are erased. A quick format removes files but doesn’t scan to verify that everything has been properly cleaned.

Right-click on the drive you wish to format.

How to format an external device using Windows Just make sure you do not erase your internal hard drive it is an easy mistake to make and there is no going back. Windows and MacOS operating systems come with an in-built format option that can erase everything from an external storage device. They all have pros and cons and work in a variety of ways including:īut first, back to formatting. We’ll give you plenty of examples of these below. However, it’s not a fail-safe option as some data recovery tools are designed to overcome a write-zero pass.Īnother option is to use a dedicated secure data deletion software. This might be okay for some uses and we’ll show you how to do it below. This performs a write-zero pass which fills the storage space with zeros. To wipe data from an external storage device, you can try using the formatting feature built into the Windows and MacOS operating systems. Two ways to wipe data from your external storage device However, TRIM only works on internal solid-state drives, not on external devices.

When you delete a file, a TRIM command immediately removes all reference to that file.

To improve system performance - it’s faster and more efficient to delete a file entry than the complete fileĭeleting data from modern internal solid-state drives (SSDs) works a little differently.

So that you can recover a file you deleted by mistake.

There are two good reasons deleting a file doesn’t delete it completely:

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The space it occupies is just marked as available which means third-party data recovery software can often recover the so-called “deleted” data. When you delete files on traditional internal hard disk drives (HDDs), the data is not actually removed. Simply “deleting” a file does not erase it Deleting files on HDDs Tips to keep external storage more secure.Popular tools and methods to securely erase external storage devices.

Choosing an app to securely erase external storage devices.

Securely erasing external storage devices using an app.

Simply “deleting” a file does not erase it.

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Note that many of the apps we’ll discuss are for use alongside desktop operating systems, MacOS, and Windows, but there are actually some options available for mobile Android users too. Read on to find out more about why you might need to wipe your device and how to do it, including helpful tools suitable for various operating systems. We’ve covered securely erasing internal memory devices in-depth before, but in this post, we’ll be delving into how to tackle external devices. It’s a good idea to make sure you know how to securely erase external devices, like: Just as devices like your computer and phone are subject to data theft, so are your external storage devices. In any of these cases, you might need to ensure that sensitive data is completely wiped and cannot be recovered by any means. Need to free up space on an external storage device, or you want to get rid of some sensitive information? Perhaps you’re disposing of a device, selling it, or simply loaning it out.