I am needing to build a file server for work where 5 of us can access CAD files stored on the server from each of our own work stations. Currently we have been using a Seagate NAS 110 which only has one hard drive and is a little slow to access from our workstations. The problem with this is when the single hard drive in the NAS fails, we lose the data so I need something that will be easy to use/maintain and with RAID 1 or 5 (I am not sure which). I am hoping to spend under $400. Does this need a lot of cpu power? A lot of RAM? I have been looking at freeNAS, but am not sure if this is what I need. Can anyone recommend the components needed for this build? Thanks for any input!