HDD to SSD

[Master PC]

I got myself a new gaming laptop (MSI Leopard GL65, if anyone wants to ask), and I am not too impressed with the 256GB SSD (Windows installed there) with the 1TB hard drive. I plan to replace my HDD with a 1TB SSD this weekend, and using EaseUS Todo (or similar kind) to migrate my system from the 256GB to the 1TB. 

 

I already know how to set the boot options in the BIOS, but the question is: the system in the 256G is still there as the whole process is just cloning. How can I format the 256G so that I can use it as an extra storage?

 

I don't want to replace my old SSD yet, as 1) I'm not up to blowing another few bucks on another SSD, and 2) I still need the space.

[TukangUsapEmenq]

When it's successfully cloned and you already boot from the 1 TB one, just delete the partitions for the OS on the 256GB one?