Toshiba today introduced a new range of 2.5-inch hard drives, running at 5,400 rpm with a maximum 640GB capacity. Although that is less space than the 1TB monsters that Western Digital have rolling out by the end of the year, the Toshiba drives are 8.5mm thick. That is small enough to fit in most laptops, making them the biggest such announced drives in this category. The WD drives are 12.5mm thick which are better suited to external enclosures.
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