[citation][nom]dark_lord69[/nom]Ummmm... what?dumb...SD Cards have a lock that keep it from being written to if that's what you want.It's a little switch. All of them have it. This product is pointless.[/citation]
That switch is just a piece of plastic, just like it was on casettes and floppies. It's up to the device to observe the no-writing nature. Besides, this technology could extend to microSD cards where there is no such tab.
This new product is actually incapable of being written-to more than once, like a CD.