1. Loosen three screws located on the back of GD05 and detach top-cover gently.
2. Loosen four screws located on hard drive bracket and detach it gently.
3. Loosen two screws near front I/O module and detach it gently.
4. Install USB 3.0 front I/O module (part number: G11303260) and secure with screws.
5. Assemble parts back in reverse order carefully. Your case is now USB3 ready.