Hello,
I understand that its nice to have a larger TB hard disk. However, two reasons why I personally don't bother:
1) 300 euro, still more expensive than used SCSI hard disks
2) the extra space and partition problems (OS 3.9/3.1 likes partitions in sizes of 2gb ideally.
3) you will never come close to filling up the extra space.
so while its nice to try and find out I am sure its counter-productive (at least for me).
For 300 euro i can have used graphics card for A3000, new network card.