I have a Sandisk Ultra Class 10 8GB microSD. When I plug it into my laptop with a microSD adapter, I can not write on it.
When I try to copy a file on it, the write operation seems ok. But when I replug it, I can not see that file.
I can not erase partitions. I can not format. Whatever I did is no go.
It looks like it is in some sort of read-only mode.
Is there any low-level tool to check what is going on the card?