How can I measure my total internet data usage to avoid hitting datacaps by my provider? I have found Measure the total amount of data that is downloaded and uploaded in a given session?, which asks for Linux.
ntop seems to do part of the job, but the problem is the stats are not saved when I shut down my PC, which means I have to manually export stats before shutting down. That obviously is a bit tedious.
And exporting would not really solve the problem because I would need to parse the json myself to get the data I want, because you can't import it again.