40 TB was my previous capacity and based around a really cheap 2 bay NAS with a mess of external USB drives attached and no backup ... and is now pretty much full.

So I ordered a 12 bay NAS (with, for now 6x 20TB disks) to bascially replace the entire old setup. I'm also planning to put the new setup in RAID 5 or 6, so it will only have an effective storage of 80-100 TB.