WR841N System Tools menu does not have Backup & Restore and certain other entries - Home Network Community
How to Upgrade the firmware version of TP-Link Wireless Router
Amazon.com: TP-Link N300 Wireless Extender, Wi-Fi Router (TL-WR841N) - 2 x 5dBi High Power Antennas, Supports Access Point, WISP, Up to 300Mbps : Electronics
OpenWRT TL-WR841N
How To Upgrade TP-Link Router Firmware | Tp-Link TL-WR841N Firmware - YouTube