Tera is 1000000000000
so according to the SI prefix list:
Peta is 1000000000000000
Exa is 1000000000000000000
Zetta is 1000000000000000000000
and finally Yotta is 1000000000000000000000000
Those are the SI prefix that surpass the Tera, but there arent any Hard Drives or anything like that with such space.
Go [here] for the entire list :)