Network usage hAP ac v6.38.5

I want to keep track of my network users internet usage per day, week and month.

What is the easiest way in setting it up. I have a 8GB flash disk connected to the router.

Thanking you in advance for your help

I’ve come across this post http://forum.mikrotik.com/t/tool-realtime-per-ip-traffic-monitor-for-home-office/70028/1 and the utility is working fine and this is exactly the basic info I require.

I’m still open for suggestions though if there is a way to get the info without having a Windows PC on and connected to the router.