Please help me could this home networking setup work?

Hi,

I am planning to buy my book live, and connect it to my wireless router.
My router is broadcasting signals to several windows devices at the first floor.
My router has a connection via ethernet cable to an airport express as an access point on the second floor of my house.
On the second floor of my house, I have a macbook which uses internet wirelessly from this airport express.

Question:
Can this macbook access all the files in my book live from this setting?

MBL does not care or know anything about wireless devices, it connects directly to the a router/switch.

Now, whether the wireless devices can access the NAS, it all depends if they can get to the wireless router.

Speed might be affected due to the signal strength though.

Never mind… Not worth the effort.