Intel Rapid Storage Technology package said to cover 11th to 15th generation Intel platforms, a 1.33 MB RAR. RST is the storage driver and controller layer used for RAID and VMD mode, and installing Windows on many newer laptops requires loading it so the NVMe drive becomes visible. The name does not specify the exact version, so check the contents and compatibility before use. Typical use is copying the drivers onto install media and loading them when setup cannot see the SSD.
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 @skclappybios. 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 →