Compact 229 KB RAR archive for the H87M-E micro-ATX motherboard, an Intel H87 chipset design. Its name gives no revision and no hint of the content type, so open it to see whether it carries a boardview, a schematic or a firmware file. Repair documents like these help you map nets, find test points and follow the power-on sequence from standby rails to the CPU VRM. If a BIOS image turns out to be inside, back up the original SPI chip and verify that the image size matches the flash before writing it.
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.