Solved! Which internal hard disk is best for sony Vaio laptop Model No:SVF14212SNW IN5,54576340 and han code:84713010

Take out the existing drive, it is SATA drive. Get a ruler, and measure it's height, could be 7mm, could be 9mm. If you have the money, upgrade to an SSD, otherwise look for same-height 3.5mm SATA drive.