Firmware package for the TP-Link TD-W8961N router in its EU version, hardware version 4.0, which the name marks as fully working. Stored as a 1.60 MB RAR, it most likely contains a full flash dump or an update image for recovering a bricked unit. Routers like this keep firmware on a small SPI flash chip, which can be rewritten with a CH341A-type programmer when the web recovery fails. Check the hardware version on the label under the router and read out the original chip before writing anything.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →