I am looking for someone who can point me in the direction of hopefully free / open source software that can monitor all the bandwidth that comes into and out of my router

I am looking for someone who can point me in the direction of hopefully free / open source software that can monitor all the bandwidth that comes into and out of my router. I would prefer something like GlassWire, however that program only seems to show me all of the devices connected but not what traffic they are using. To make it simple, I am looking for an easy-to-use program that shows each IP connected to the router (IP along with computer/tv/device name such as "ROKU stick (bedroom)" which GlassWire also does but I need the program to also show how much bandwidth that deviced has used over a given period of time (if the program is open in the background for 15 days, then I would like 15 days of data I would be able to save and go back to a look at later. IF GlassWire has this option I am not aware of and you can show it to me, that works, you will still have earned your money. ALSO. I a m using an AT7T NVG510 cable modem router which does not have many options. However I also have a Netgear Nighthawk X6 I can put on the end of the modem, the Nighthawk has a lot more options. If you have any questions for me, please contact and we will discuss. THANK YOU