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To check if security permissions need to be changed, follow the steps below. The security permissions may be set so that all users only have Read permissions to files on the flash drive. If using DiskPart, as detailed above, does not work to clear the read-only attribute of a USB flash drive, the security permissions may need to be changed.

Or, to set the read-only attribute (making the flash disk write-protected), use the command attributes disk set readonly. To clear the read-only attribute (making the disk writable), use the command attributes disk clear readonly.You can list the attributes of the disk with the command attributes disk.

In this example, we want to work with disk 1, so the command is select disk 1.

Select your USB flash drive with the select disk command.In this example, we know that Disk 1 is our USB flash drive because its size is listed as 14 GB. Use the size of the disk to determine which one is your USB flash drive. At the DISKPART> prompt, type list disk and press Enter.If you receive a User Account Control prompt asking you for permission to continue, click Yes.Press Windows key+ R to open the Run box.You can use the Windows DiskPart command-line utility to enable or disable read-only mode on your USB flash drive. Using DiskPart to change read-only settings This action effectively sets all files, and the device itself, to read-only mode. If your device has this switch, move it to the "Lock" position.

The write protection switch is useful for keeping the contents of your drive safe from malware when you need to view them on a public computer. Some USB flash drives have a write protection switch on the side or bottom.