The TD-W8901G has no native backup function. However, you can use a tool like tftp to dump the firmware (advanced users only). In most cases, the old firmware is obsolete anyway.
If your router has a custom ISP-branded firmware (e.g., BT Home Hub version), the official TP-Link firmware will refuse to flash. You must use the ISP’s proprietary version. Tp-link-firmware-td-w8901g
Avoid random forums or file-sharing sites unless you verify the MD5 checksum. Unofficial firmware (like OpenWrt or DD-WRT for this model) is extremely risky due to the closed-source ADSL driver. The TD-W8901G has no native backup function
Open a web browser and type 192.168.1.1 into the address bar. If your router has a custom ISP-branded firmware (e
The is a classic ADSL2+ modem router that has been a staple in many homes and small offices for years. While it is an older device (802.11g standard), keeping its firmware up to date is critical for maintaining stability, security, and performance.