32 MB BIOS binary saved as a copy and labelled only u366, which most likely refers to the board location of the flash chip it was read from. No device, brand or board number is given, so the origin must be confirmed before use. The size matches a 256 Mbit SPI flash. Check for model strings with a hex editor and compare against the board, then program with a CH341A, RT809H or similar tool. Always back up the existing chip before overwriting it with this image.
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 @biosfilebins. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →