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. There are two good reasons deleting a file doesn’t delete it completely: so that you can recover a file you deleted by mistake, and to improve system performance - it’s faster and more efficient to delete a file entry than the complete file.ĭeleting data from modern internal solid state drives (SSDs) works a little differently. 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
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 hard drives, SD cards, flash drives, or whatever else needs to be wiped. 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.
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