![]() ![]() When you copy a file to an SD card, the circuits inside it move charges around the chip in a way that will persist when you unplug it. The SD card (or a small USB stick) is called a "Flash" drive because that is the name of the "Flash" type memory it has in it. I think I will start with a couple of things that I think you may have misunderstood. ![]() To fully answer this question requires all sorts of background information.
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