I have the above subject card and I’m frustrated. Sure, I flipped write protect lever back and forth waited 30 seconds, etc. all to no effect. I called TS and they were of no help. They said, “try it in another computer” and I said, “even if it works in another computer, how will that help me make it work in mine?” I’m using their own, i.e. Sandisk All in One reader… so what else is left. I’ve seen other posts re the cards all of a sudden refusing Adds, Deletes, Formats, and I think the company ought to get off their corporate seats and address this problem. Tha’s my $.02.
Because if it works in another computer that means there’s something about yours that is causing the issue. The card is then proven not defective, and it narrows down the possible causes. Just like Sherlock Holmes, sometimes to find the correct solution means eliminating all in incorrect ones.
What could it be about your computer? Several things actually. Did you click on the link in the previous response to yours in the other thread and read it thoroughly? It speaks about write-protect problems with memory cards and offers some tips to try from repositioning the switch itself to editing your Windows Registry.
Did the SanDisk Tech Support suggest anything like this? Did you read the article and try the suggestions on your own? Is the card under warranty?