from the hardware version dropdown, as installing firmware for the wrong version can "brick" your router. The Manual Upgrade Process : Once found, download the ZIP file and extract the : Connect your PC to the router via Ethernet and go to 192.168.0.1
To download the firmware for your TP-Link TL-WR850N V3 router, follow these steps: Tp-link Tl-wr850n V3 Firmware Download India