How can I format a USB drive with "writable disk is required" error?

Question

How can I format a USB drive with "writable disk is required" error?

Hey there,

I need to use one of my flash drives but I need to format it first. If I connect the USB and go to Disk Utility > erase I got the following message error.

This flash drive was partitioned, but it is protected, I don't know why. I try to change permissions with `sudo chmod` and also tried with `sudo diskutil eraseDisk free EMPTY` and `diskutil zeroDisk /dev/disk2` but both of them show me the same console error:

Error with zero disk erase: A writable disk is required (-69772)

How can I fixed it?

MacBook Pro

Posted on Aug 14, 2022 5:42 PM

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Answer 1

Owl-53

Level 10

103,231 points

Aug 15, 2022 1:21 PM in response to CamilaBelenPC

Has any of the Bundled software that was on the Drive been installed on his computer.

https://www.kingston.com/en/company/press/article/6999

If so, Remove the software as per the Developers Specific Instructions

If no Manufactures Software was installed on the computer, normally the way to Format the drive would be as per below image

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Answer 2

allen_31

Level 2

337 points

Aug 17, 2022 1:41 AM in response to CamilaBelenPC

The easiest way to erase any storage drive on Mac is by using Disk Utility feature. But sometimes, Mac Disk Utility can’t erase the hard drive due to various reasons. However, the issue can be fixed using below DIY methods:

How can I format a USB drive with "writable disk is required" error?

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