Need to make a a proper NAS rather than the mashup of HDD i have running off a windows PC. I need 20TB at least but more would be nice for future proofing (or if drives can be added in later easily). What is the typically recommended drive size these days, and what RAID do most of you go with? I was considering getting these as some of the 12TB drives are already around $200. I know raid 5 is a popular option so i would need to get 3 of these. Are there better options i should consider, this particular brand does have 12TB for $130 so 5 of those would be a slightly less money and more capacity. Any suggestions are appreciated. It will mainly be used for movie / show storage but will also be backing up photos. Suggestions on how to backup this large amounts of data like this in a cost effective way would also be nice.