An archive of repair files. Shared as “J730F_U7_Android_9_ROOT_J730FXWS7CTF2_File_By@MobileRepairOfficial.tar” — a .tar file, 21.1 MB.
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 @mrepairo. Enginerys does not host this file.