Reusing a corrupt SD card [duplicate]

I have, not one but two microSD cards that my phone (Samsung Galaxy Young, Gingerbread OS) seem to have broken. One is 1GB and the other is 2GB. The 1GB one won't be formatted.

When I put the 1GB one into the computer the computer prompts for a formatting. I don't care for the content so I tried to format it, but to no avail; the format fails and I have no idea what to do to make it work again.

I tried using the SDformatter software, but it can't format the card as it is write protected. I'm googling to solve it but so far no success.

My computer OS is win7 if that's of any relevance.

Solution 1:

Golden Rule #1

As soon as an SD card [or USB stick] starts to play up - bin it. They're not worth the effort once they error.

I go through literally hundreds of them for work. Low write count, high read count.

If they error once, they will error again. Quality control on them is, let's say… variable.

Some of them have a controller chip that will permanently lock them to read only if they detect a write error, as a preservation measure. There is no way to unlock them once this happens.

Golden Rule #2

Don't use them to store anything valuable.

Edit:
If the data on an SD card was truly valuable, it is theoretically possible to replace the controller chip, or even directly access the memory itself. This service can be performed by data recovery specialists, but they charge a lot for their efforts & still can make no guarantees.

Rules 1 & 2 are still 'best practise'