The best way to get a handle on the size of Toshiba’s 0.85-inch hard disk drive is to imagine an SD memory card that’s an extra millimetre thicker — that’s how small it is. The company already has a working prototype with 2GB capacity. It would hold up to 4GB of data when commercialised later this year, Toshiba said. Pricing details haven’t been announced but a company spokesperson indicated it would be priced to match the products it was aimed at. “We haven’t finalised pricing but the intent is by the end of the year for production to be between 200,000 to 300,000 [units] per month so it’s obviously not going to be $US500,” he said.