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This question already has an answer here:

So my USB drive fell out of my Mac whilst I was saving some stuff. I plugged it back in but I was told that 'MacOS could not fix this device'. I plugged it into my windows machine and attempted to do a Full Format, however I am told that the disk is write protected. Here's what the main directory on it looks like: (https://i.stack.imgur.com/JNIGN.png), and what is shown when I try to format it: (https://i.stack.imgur.com/DMpXp.png)

I really can't afford to buy another stick of this size, is there anything that I can do to format it again? I was at least smart and made a backup of the data (AFTER scanning for viruses!)

Many Thanks

marked as duplicate by Kamil Maciorowski, Ramhound, DavidPostill May 9 '18 at 17:16

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Have looked at other answers but none of them have sorted my issue – Thom May 9 '18 at 13:09
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This page from EaseUS offers a possible solution: change the registry key HLKM\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies attribute WriteProtect value to 0, re-mount the device, and try formatting it again.

(Note: This solution turns out to be listed, though not particularly highlighted, in the suggested duplicate.)

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