Boardview archive labelled GH5AD2D V1.0, a 413 KB ZIP, with no brand or device model given in the name. The board code and version 1.0 are the only identifying details, so match them against the silkscreen on your PCB before using it. Boardview data shows where each component sits and which net it belongs to, which speeds up locating test points, checking power rails for shorts and tracing signals. Open it in a viewer like OpenBoardView or FlexBV, depending on the format inside.
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.