I'm in the process of setting up a NAS. My router is on the ground floor, and my desktop on the second floor is linked via powerline adaptors. The easiest location for the NAS is in the vicinity of the desktop. Would a basic switch such as this do the trick, or is there any value in spending more?
http://www.overclockers.co.uk/showproduct.php?prodid=NW-040-TP&groupid=46&catid=2316
http://www.overclockers.co.uk/showproduct.php?prodid=NW-040-TP&groupid=46&catid=2316
