Virtualmin , System Settings, Bandwidth Monitoring, Show Usage Graphs, By month.
The dates in the left column labelled Month are weird and the data is missing for February to June inclusive. I was wondering if it was because today is 31st and some months don’t go that far but March and May do have 31 days.
When you set it up did you select “monthly”
Never quite understood why when you do select anything other than “latest” that the number of days does not change. what does “yearly” 30 days mean? or “weekly” 30 days mean or even do?