11 years ago
are you using it in a PC or a phone/mobile device
Looking at the card, there should be one side that has a diagonal notch out of it. One the same side of the card as the diagonal notch will be a tiny horizontal notch in the edge. This is normal and fine. On the opposite edge, there may be another horizontal notch, a sliding tab/switch, or nothing at all. If there is just a notch, the card is permanently write-protected. Try covering the notch with a tiny piece of tape, taking care not to cover any of the metal contacts on the back. If there is a sliding tab, slide the tab in the direction opposite the "lock" arrow on the label. If that doesn;t work, try sliding it somewhere in the middle. There may also be a notch on the back of the card, near where the tab is. Cover this notch with tape, as above. If there is no tab and no notch, the card may have been encrypted with write-protection at the manufacturer, or it may just be broken. In all of the above scenarios, if you are using an adapter or card reader device instead of just using the card as-is in your camera or whatever, there may be a write-protect tab on the adapter as well. Check there, too.