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How To Fix USB Becomes Write-Protected After Trying To Install Windows Via Bootcamp?

I tried to install windows using BootCamp, and it formatted my usb and loaded windows files and gave me an error that not enough space available, so I changed my mind and wanted to use my pen drive for other works, but bootcamp made it write-protected not able to format it or edit it, popping up 'This device couldn't open'. Tried using disk Utility and many more...

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iBoysoft author Vain Rowe

Vain Rowe

Answered on Tuesday, August 5, 2025

 If the USB drive is simply write-protected as you discuss, you can switch its lock to another side for unlocking the write-protection. While I guess your USB hard drive is not write-protected but encounters other trouble instead.

Based on your failure to format the USB hard drive on Mac, you're suggested to format the whole physical USB drive rather than just a partition or volume. Select the USB drive in Disk Utility and click Format on the top menu, then wait for Disk Utility to finish the formatting.

If this format fails as well, then read the article for more solutions: Fix 'Couldn't open disk 69879' When Erase Process Has Failed

 

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