Chris has personally written over 2,000 articles that have been read more than one billion times-and that's just here at How-To Geek. This isn't necessarily true, and it's more complicated than that.)Ĭhris Hoffman is the former Editor-in-Chief of How-To Geek. (The conventional wisdom is that, with TRIM enabled, the SSD will automatically delete its data when you delete the file. Secure delete tools just don't work reliably with solid-state drives. The file will appear to be deleted, but its data may still be lurking around somewhere on the drive. A secure delete tool can tell an SSD to overwrite a file with junk data, but the SSD controls where that junk data is written to. Deleting a file will result in a "TRIM" command being sent, and the SSD may eventually remove the data during garbage collection. With modern solid-state drives, the drive's firmware scatters a file's data across the drive. Unfortunately, there's a bigger problem with modern drives. You may "securely delete" a financial document, but older versions of it may still be stored on disk as part of your operating system's previous versions feature or other caches.īut, let's say you can solve that problem. The operating system may have made backup copies of this file in a number of different places. The first problem with these tools is that they'll only attempt to overwrite the file in its current location. If you have sensitive data - for example, business documents, financial information, or your tax returns - you might worry about someone recovering them from a hard drive or removable storage device. This is still possible on USB flash drives and SD cards, too. But that file's data was still sitting on the hard drive, and file-recovery tools could scan a hard disk for deleted files and recover them. The operating system would mark the file as deleted, and the data would eventually be overwritten. Traditionally, deleting a file from a mechanical hard drive didn't actually delete that file's contents. Related: Why Deleted Files Can Be Recovered, and How You Can Prevent It On a fully encrypted disk, both deleted and undeleted files are protected. Rather than relying on these sorts of bandaid file-deletion solutions, you should rely on full-disk encryption. The problem with "secure delete" and "secure empty trash" is that it provides a false sense of security.
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