Archive for the Gigabyte Aorus board GA-RX5LXC, revision 2.0, packed as a 7.73 MB RAR. The name does not specify the contents, so extract with 7-Zip or WinRAR to see whether it holds a schematic, boardview or both. Such documents serve for tracing power rails, locating components and checking a short on the main board. Gigabyte boards often exist in several revisions, so verify that the revision on your PCB is 2.0 before trusting values and part positions.
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 @ShareMan_Electronic_Files. 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.