Related: How To Overwrite Free Space Securely in Windows This will ensure those deleted files can't easily be recovered without wiping the entire drive. If you've deleted some files from a mechanical hard drive or an external storage device, you might want to wipe only the free space, overwriting it with zeros. This is a particularly important step to take when you're selling or otherwise disposing of a computer, drive, or USB stick that had sensitive private data on it. This is actually a pretty simple process: Windows will write zeroes or other junk data to every sector of the drive, forcibly overwriting any data already there with junk data. To prevent this from happening, you can "wipe" a drive. solid-state storage: External storage devices like USB flash drives don't support TRIM, which means that deleted files could be recovered from a USB flash drive. However, it's not so simple as mechanical vs. This should not be the case on modern solid-state drives, as they should use TRIM by default, ensuring that deleted files are deleted immediately. If the drive is a traditional magnetic drive with a spinning platter, deleted files are simply "marked" as deleted and will be overwritten in the future, making recovery of deleted data easy. Related: Why Deleted Files Can Be Recovered, and How You Can Prevent It Whether this is possible depends on a number of factors.
It's often possible to recover deleted files from a drive.
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