It is not the hardware of the SD card itself, but the hardware responsible for reading the SD card may or may not respect it, which is outside of the operating system's control.
Yeah that's what I was going for. If it was a hardware killswitch on the SD card, then the device trying to read it wouldn't have a choice. But, as you mentioned, it's just a flag that the device can choose to ignore. Which seems really stupid imo.
But if the device respects that switch, malware could not damage the SD card.
Good point. Though, I doubt the read/write device respects the switch in it's hardware. Ie. malware in the read/write device could disable said devices respect of the SD switch.
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