A thin ribbon cable attaches the 128GB SSD to the motherboard, and as you can see there is no enclosure for this drive — it’s just a circuit board with eight memory chips on it — which helps keep the weight down. A special algorithm is used to write data to the SSD, in order to ensure that data is written to all areas of the memory and not always to the same spot.
The Portege R600 will also accept a regular (spinning) hard drive, but the advantage of the SSD is the fact that it has no moving parts, which makes it less prone to damage and also allows it to run cooler. It also won't vibrate, can withstand higher temperatures (up to 20 degrees Celsius more than a conventional drive) and it’s faster. The issue of capacity is slowly being addressed and Toshiba recently announced an SSD drive with a 500GB capacity.