i did a search and really didnt find a answer which im sure is the DUHHH! part of this software...i have existing hdd with blur-rays,dvd & music already backed-up. can i build a server and use those hdd without buying new hdd or formating my existing hdd? to my understanding thats what made "unraid" so great vs. using something like "freenas". i already have atleast 2TB filled already and need to know if its ok to buy another hdd and continue "ripping" if you will, until i actually build my server?