boagz :
Rogue Leader :
If its just to hold data why even waste the money building something. Get a Western Digital MyBook NAS and plug it in and be done with it.
Well I want to install perforce version system control software onto my NAS for which I don't think I can do easily on a prebuilt NAS such as my book or my cloud though I could be wrong.
That I do not know, but I would suspect probably not. Most likely it would need to be installed on the client side but if you're using more than 1 PC to access the NAS that messes that up. It is worth looking into but I doubt it.
Ok so back to your question. A NAS really can be any PC you don't need anything special to be able to do it. IMO build the cheapest thing you can the only things I would worry about are getting a good gold efficiency PSU and a NAS or Enterprise hard drive, because they are made to run 24x7. Otherwise the cheapest mothebroard/pentium/etc. I don't have experience with it but you can also avoid windows and run Linux on the thing to save money and overhead there as well.