Versus        
     Then  15 Megabyte   $2495              Now  1 Terabyte(1024Gb)  $60

                        1 Terabyte is 96,867 time larger than 15 Megabytes




So what comes after Terabyte?                                                                                                          

Value
1000	k	kilo
10002	M	mega
10003	G	giga
10004	T	tera
10005	P	peta
10006	E	exa
10007	Z	zeta
10008	Y	yotta