The disk is write protected usb

If you still get the error after the external switch is off, try this registry hack!!!!

1.Run Registry Editor (regedit).
2.Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
3.Create a New Key named as StorageDevicePolicies.
4.Highlight StorageDevicePolicies, and then create a New DWORD (32-bit) Value named as WriteProtect.
5.Double click on WriteProtect, and set its value data to 1.
6. If WriteProtect Value is set to 0, it's not writeProtected.
Enjoy!!!!!