For about one year, the maximal storage capacity of 2.5" disc-based HD were limited to 500 GB. Most manufacturers have been concentration on the 3.5" models. However, Seagate announced the first 2.5" HD featuring 640 GB storage space, however it only comes as an external HD.
In addition, we could not get that much more information about this drive. From the specifications, we can define that it is based on two 320 GB discs, however no details about the rotation speed, cache memory, performance or price. Further details might come with the final availability of the product.
