RAR archive of about 3.5 MB named only A107F, a code matching the Samsung Galaxy A10s SM-A107F, though the archive content is not described in the name. Packs of this size usually hold a schematic or service pages rather than full firmware. Extract with WinRAR or 7-Zip and review what is inside. Diagrams for this model help trace power rails, charging faults and display lines. Make sure the phone's label reads A107F, as close model numbers belong to different boards.
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 @uzb4422. 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.
7-ZipWinRARThe Unarchiver (macOS)