Cannot format micro sd, believe me, i tried everything

Memory Cards Mobile memory, professional cards and all other st
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Hi everyone, I get exactly the same issue with my sandisk ultra 64GB SDXC class 10,it's with me since 7 months, but suddenly get this problem, same write protection, same unformattable, after format.... Just restart and everything will return back, i sent a message to sandisk they told me that you have to replace it because its corrupted. Iam really want to know the cause of this problem and exactly the the problem itself...... Indeed