I'm around 10 tb also. Until recently, I had the backups (2x 16 bit, 3x 24 bit) scattered on a bunch of hd's. I just spent $1k (ouch, more than my Oppo 95 cost!) on 3 14 TB Western Digital drives & I now have 3 copies of each, sorted by genre & artist (sorting & transferring the files wasn't fun!). + a few thousand discs & 2 6 TB drives for movies & several thousand discs. I also have a copy of all music files on numbered flash drives with an Excel sheet telling me what's where that I use for the Oppo playback.