OK.. it's been 15 months and all is well.
I have used 1.11 TBs and have 2.94 left.
When I get closer to being full I will start tossing out less relevant jobs that are older than 3 years.. and also some raw files and just keep the processed ones.
I have a lot of HD video on here that I converted to MP4s and I have most of all the family photos (wife has 50+GB alone).
There was an incident where I accidentally unplugged the unit from back of iMac and it went fubar for a few minutes (unrecognizable). A quick call to support and was well.