When daily upload + download reaches 2 TB, the 30 day transfer history graph becomes corrupted. I see from the settings.dat file that much larger values are supported, however the graph rendering does not autoscale correctly. Also the y-axis labels for large volumes do not have enough space to be fully displayed. I first noticed a few years ago on a different computer + Windows, when I first upgraded to fibre internet, and now using a fast VPN I see this problem still persists while I've upgraded hardware and O/S.