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.