The "just wants to do it" is evidenced by the mention of TB as opposed to hours of content.
Discussing hours takes away from the total because some of it is backups made on different DVRs that aren't interchangeable. The number dwindles further because of your policy of limiting how full the discs are allowed to get to maintain acceptable performance.
Take away the ties to the recording DVR and make it so you don't have to reboot and you'll have something. Being able to conveniently move things around would be icing on the cake.
TiVo's approach to whole home was cool...copy programs from the DVR where recorded, to the DVR where viewed. This allowed you to move content that was "precious" to an additional DVR. I moved a lot of recordings around before I finally decommissioned most of my DirecTiVos.