RAR package for ASUS E35M1-I and E35M1-I DELUXE motherboards, with the name pointing to revision 1.01 for the standard board and 1.01X for the DELUXE version. At 152 KB it likely contains schematic or reference documents per revision. Such material helps when tracing power rails, finding the source of a short or checking components around the VRM. Check that the revision silk-screened near the board edge matches the file you open, since revision differences can move parts and change component values.
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 @boardview. 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.