I pgraded a A205 and an A305 Toshibia laptops by replacing the dvd drive with a Blu-ray drive. A205 required a PATA Blue ray drive while the A305 required a SATA. Cost for them was a $100 ea. In both cases all that was required was removing one screw and swapping faceplate. A305 screw was hidden inside the memory compartment.
The usb one would be cheaper, but swapping the one that is in there would be more portable.