Here are the specs for the motherboard:
www.asus.com
There is no mention of a m.2 port either sata nor pcie.
Past that, while some motherboards may allow pcie devices to be installed in a pcie slot.
Older motherboards may not have the ability to boot from it.
I do not know if this is the case here, or not.
I think the OP picked a particularly good ssd in the samsung 860 evo.
Be certain to attach it to one of the two 6gb sata ports for best sequential performance
I might have gone with 500gb, budget permitting.
If the used portion of the windows C drive is sufficiently less than the size of the ssd, then the samsung ssd migration app will make the transition easy.
One can download the app and user instructions here:
Download various software related to your product, including Samsung Magician, designed for use with Samsung's memory products, and find related information.
www.samsung.com