Secure wiping the data in a USB drive or SD Card However, if your current vendor doesn’t have such a tool, this article will provide you with several workarounds. A lot of manufacturers today are providing tools that you can use to wipe data securely on their devices. Lack of a tool that can leverage the memory controller, your operating system has close to zero chances of addressing every single cell on these devices. This feature raises a security issue of possible data recovery. When writing any data on a flash storage media, the memory controller will dynamically map all empty cells, and during low load, it will wipe the unmapped blocks/cells. Most of these flash storage drives have a 10-20% more on-board storage than the indicated capacity and a memory controller. Having this in mind, the overall process of writing data to SD cards would be longer, were it not for new technology implemented on these devices. Before looking at some of the ways to wipe data securely on SD cards and USB drives, we need to understand why it’s more complicated compared to ordinary hard drives.įlash storage devices require a block/cell completely wiped out of any data before any other data is written on it.
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