Adding more drives later down the line?

[Syko]

Starting with 2x 6tb drives which by ran in 'mirror' .

Am I right saying a add an other drive later on  To the same pool ? 

 

[arvinpw]

If you want to add drives later down the road, you should start with minimum 3 drives.

You can't adding drive with initial setup 2 drives.

[Syko]

Thanks,  I'll hang on for a bit till pick up a 3rd drive 👍