This is an absolute must-have for ISPs with data caps!  

This is something I would've expected to already be available. A "total" bandwidth usage (eg. per week / month) and being able to have the bandwidth usage per device would certainly be a great addition to the Deco system.

(I currently have the XE75 3-pack)

How is this not a out-of-the-box feature? I have had the same ISP for 2 years and from the moment I added Deco to my network I have suddenly started exceeding my 1TB monthly cap. I have never even come close to it before and there have been no changes in usage patterns. How am I supposed to know what the issue is if I cannot get the usage by device? The fact that this has been a requested feature for over 2 years now and no progress has been made makes me want to just sell my Deco routers and get something else instead. Matter of fact, with paying for overage charges I am better off financially just throwing them away and getting something else instead. New routers will pay for themselves before TP-Link wakes up and starts listening to its customers

  @winybulldogge I m starting to think the issue has something to do with the TP Link routers themselves.  I have never had an overage with Xfinity and now since I added the Deco AX5300 mesh system to my house, my data use has tripled over the course of one month and I have no clue why.