Simplify the following text for a Grade 7 native English-speaking person.
Original: In July 2010 , Sony announced two new sizes of Slim PS3 , 160 GB and 320 GB , with the 120 GB model being discontinued in Japan .
Simplified: Currently , the PS3 is sold in a new , slimmer and more efficient model with a 160 GB or 320 GB HDD .