Small firmware-category RAR of about 942 KB for the Xiaomi Redmi K30 4G variant. The name does not state the contents, and the size rules out a complete ROM, so it likely contains partition backups, calibration data or a related service file. Extract it and check what is inside before attempting to flash. Always save the device's own partitions first, and make sure the file is meant for the 4G model rather than the 5G Redmi K30, as those use different hardware and firmware is not interchangeable between them.
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 @cyberlanelectonik. 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 →