Here's how to limit data usage on TP Link router from its management interface. If you set a data limit, you will receive an alert message when you have used 90% of your data. The internet access will be disabled automatically when you reach the data limit that you have set. To know how to limit your data usage on the TP-Link router, refer to the step-by-step instructions provided on this web page.
Wired connection:
Use an Ethernet cable for connecting the LAN port of the TP-Link router and the Ethernet port of your computer.
Wireless connection:
Navigate to the Device menu and click Data Usage Settings.
You can even see how to limit data usage on TP link router by performing the following steps.
On the router’s management interface, click Device -> Data Usage Settings.