So my research into this eco system thus far has lead me to believe that my hopes of simply installing TrueNAS over my old windows system drive and enabling me to access my exisiting array of various hard drives wont work as easily as i had hoped. If i understand correctly I will need to backup the data on my existing drives before i can add them into a pool and "start fresh". I guess my main reason for posting this question is the posts that i gathered this info from were between 5-8 years old, so thought it might be worth asking in case some funtionality has changed since then. But as i type this and read through another forum post I'm now lead to beleive that i can add individual drives to my NAS with existing data... So now i'm not just confused but NOOB confused.