If you are also confused about the steps, I also find this for you on the internet:
1. Plunge this USB to a computer or laptop.
2. Click “Start” on the taskbar to open “Run” and type in “regedit”.
3. Hit “HKEY_LOCAL_MACHINE” to expand “System”.
4. Find “Current Control Set” in “System” list to click “Control”.
5. Check whether there is a key named “Storage Device Policies” to change the digit in the “DWORD value” box into "0" and press “OK”.
But, if you cannot find the key named “Storage Device Policies”, you are supposed to create one: right click “Control” to create a new key and name it as “Storage Device Policies”=> right click this new key to open “DWORD Value” and name it as “write protect”=> Double click it to change the number.