Sandisk is a brand mark of the portable disks now a days the storage of this disk was solid and it comes with a usage of 400 gb nearly but the rate of this product is quite a bit high with its competitors in the market with the less price the same built in feature can be given by toshiba or WB they will take a reasonable price I would recommend not to go with this much expensive as the other company disks are in low price compared.
you can buy a product other than this company. This was not slim like Seagate products so I would not recommend going for this.