Finding who generates traffic

The network generates traffic in Internet upload for about 500MB per hour, this only in certain hours of the day.
My ISP is penalizing me for this excessive traffic and therefore I have to find who is generalizing it.
How can I do from IPFire?
Then, having found the PC, I have to understand what is generating it. Anyone have to suggest me a tools for Win10?

You can try

https://www.venea.net/web/nettraffic


Look up how to use iptraf-ng
The LAN station monitor or IP traffic monitor function should be helpful

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If indeed, a win10 pc is the issue,

Settings > Networks > Data Usage where it lists which app has traffic

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I need to find the PC that is generalizing traffic in INTERNET UPLOAD.
The traffic over PC’s ethernet card is also for other reason, for example to NAS, server or printers.

Czy próbowałeś iptraf-ng?

The following is an example of using the LAN station monitor function on interface green0
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Before uploading a large file

When a computer uploads a large file

You could also look at pmacct
https://wiki.ipfire.org/addons/pmacct

This monitors data usage down to the client level and the data is stored either in a memory table or in an sqlite3 database.

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