Original: Two Stock-keeping units were available at launch : a basic model with a 20 GB hard disk drive and a premium model with a 60 GB hard drive and several additional features ( the 20 GB model was not released in Europe or Oceania ) .
Simplified: In October , a new version of the Playstation 3 which is the 40 gigabyte model was introduced and the price of the 60 gigabyte model was further reduced .