Uh, not really exp. in this area, but he could go with some synology device:
http://www.synology.com/products/index.php?lang=enuI have this one:
http://www.synology.com/products/spec.php?product_name=DS411slim&lang=enu#p_submenuIt really depends how much money and time he wands to spent with, maybe there is cheap a easy solution, but i don't know any. That Home NAS from synology costs cca. 300e + HDDs.. HDDs could be problem, the price is quite high now, but he could go with one, then buy later another.
They have that soft called Diskstation Manager 3.0 which is nice for controlling most of the things, blabla setting up the saring options, bittorent client, etc... (but i still ended up ssh-ing into it
)