Yes, but ....
1. Seatools is not the utility you need. It is for diagnosing faulty HDD's. You want Seagate's free package Disk Wizard, which does do cloning TO Seagate HDD's.
2. When you do this, watch carefully the SIZE of the Partition it proposes to make on the Destination drive (the 2 TB unit). It will probably propose to make it 1 TB, same as the old unit. Do NOT accept that. Use the menu choices to make the new unit's Partition what you want - probably the entire unit in one Partition.