I'm going to use an older PC as a file server to store pics, video and music and plan to connect it to my main pc via my router. My question is how should I set up the power management so that the file server uses the least amount of energy but remains available on my network the moment I need a file? Should I have the system go into stand by or have the hdds stop spinning? I would like to leave the server on all the time and want to save as much as I can on the electricity without having to wait to access a file. Thanks.