1: Connect my HDD to my router and have the Macbook be able to see it and copy files as needed.
2: Have the HDD idle / spin down after period of inactivity.
3: Have Time Machine see the drive if I format a parition in HFS Plus so I can use it as a capsule as well.
How would one go about this? I have tried to set it up via the GUI as below

But the Macbook won't connect? I just want to be able to drag and drop files? Can I get AFP maybe, and if so how?
Finally I want to be able to read HFS+ so I can see it via TIme Machine and set it up as a Capsule. Which package do I need?