Currently they have PlayStation 3 consoles with 20GB and 60GB capacity, but the firm says this won't be big enough:
"For users who vigorously store (games and other entertainment content) in the PS3, 20-giga is probably going to be too small, and even 60-giga may not be big enough eventually," Sony Computer Entertainment spokesman Satoshi Fukuoka said.
Fukuoka said, however, that potential changes to the PS3 are not limited to its hard disk drive capacity.
"We are not likely to change its core components and functions such as the Cell, RSX, Blu-ray drive and network capability. But outside that realm, addition and deletion is quite possible," he said.