hey any before buying a hdd first check whether its sata or the old one (ide)also check you motherboad data online whether is supports 500gb.... coz when i tried upgrading my ide hdd to 300 gb on my laptop which had a 80gb hdd. it didnt support it and on searching the net i found my motherboad only support a maximum of 200gb.also check ur harddisk height otherwise it may not sometimes fit into the hdd slot or case if ur laptop has one