You can check the traffic usage as well as the HDD activity of your VPS from the VPS control panel itself. There is a built-in option 'Statistics' is available to see the graphs to get an approximate idea about your usages. You can watch the video tutorial from this link. Here I am providing the steps to check it from the VPS control panel:
- Login to the VPS Control Panel using the details you got from the VPS activation email.
- Select the server you need to check and scroll down a bit. You will be able to see the 'Statistics' option as shown in the image.
- Click on the dropdown menu and select the time span you need to check the usages.
- You can select the required time span from there and get the graph for the same.