This question already has an answer here:
- Software for measuring internet traffic? 6 answers
What is the simplest solution to measure entire internet traffic at home? I have several computers connected to Internet via
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
While product recommendations are generally off-topic here, there are a couple types of solutions that you can use. Some are more practical than others for home use.